"1 kilobyte. 1 kibibyte. 1 kilobit. 1,000 ASCII characters. Source code, file size, tile size, the number of letters in a short story: you decide."
That—making the most of limited resources—was our challenge to you. In return, we received a host of fantastic entries, ranging from short stories to procedural robot generators. Now comes the challenge of picking one to win a terabyte hard drive from Seagate, but not before we collect all the entrants in one place.
The gallery of 1K wonders follows after the jump.
CSS Mario Head
By Pomokey
Shown here as an image - source code

Mona Lisa
By Gabriel McGovern -

1,000 digits of PI
by Cayton
1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679821480865132823066470938446095505822317253594081284811174502841027019385211055596446229489549303819644288109756659334461284756482337867831652712019091456485669234603486104543266482133936072602491412737245870066063155881748815209209628292540917153643678925903600113305305488204665213841469519415116094330572703657595919530921861173819326117931051185480744623799627495673518857527248912279381830119491298336733624406566430860213949463952247371907021798609437027705392171762931767523846748184676694051320005681271452635608277857713427577896091736371787214684409012249534301465495853710507922796892589235420199561121290219608640344181598136297747713099605187072113499999983729780499510597317328160963185950244594553469083026425223082533446850352619311881710100031378387528865875332083814206171776691473035982534904287554687311595628638823537875937519577818577805321712268066130019278766111959092164201989
Mini Robot Factory
By Umrain —
Find all 10
By Thaddeus Smith (Click photo to zoom)

Untitled
By W000T
0100111101100100011001010010000001101111011011100010000001100001
0010000001010100011001010111001001100001011000100111100101110100
0110010100101110000010100100000100100000011101000110000101110011
0111010001100101001000000110111101100110001000000110010101100001
0111001001110100011010000010000001110100011000010111010101101110
0111010001110011000010100110000101101110011001000010000001110100
0110000101101001011011100111010001110011001000000111010001101000
0110010100100000011101000110111101101110011001110111010101100101
0000101001100001001000000111010001110010011010010110110001101100
0110100101101111011011100010000001110100011010010110110101100101
0111001100100000011011110111011001100101011100100010111000001010
0101000001101001011000110110000100100000011001100110000101101110
0111010001100001011100110110100101100101011100110010000001101011
0110100101101100011011110110010101100100000010100110000100100000
0110110101100101011001110110000100100000011101000110100101101101
0110010101110011001000000110111101110110011001010111001000101110
aBBGecedary
by Wastrel

Tiny Illusion
By Comedian

Paint Program
By Aubrey
Screenshot shown - 1000 bytes of HTML, CSS and JavaScript

Untitled
By Dan Hernandez

RGB tunnel
By IQ
Download Windows executable (I'm on a mac, will add a screenshot in a bit)
Mandala Painting Applet
By Technogeek - Link
Screenshot shown of the rotational version.

Straight Punch to the Crotch
By Billy Hunt - Band Logo

Bart
By Juan Calderon

3D matrix of the BBG logo
by Advaranaut
Screenshot here - 1000 byte source

Short stories
Untitled
By Bardfinn
Frink was breathless: "It happened while I was testing a batch of the new Giant MagnetoResistive tech; I'd initialised the platter with zeroes and then read it back to verify. The qual script flagged it as a write failure, but with an incredibly high failure perce-"
Johnson interrupted: "Cut to the chase, man - you're saying the run was contaminated."
"No - no sir, it's not that at all. I dug through the log fil-"
"So if it's not contamination then it's the test equipmen-"
Frink spoke uncharacteristically louder: "NO, sir, let me finish: I checked the log files. It's reading back the same values every. single. time. No matter /what/ we write to the platters."
"... So?"
"At first, we thought it was random noise - but it turns out to be twenty-two digits from the deeply insignificant depths of Pi, sir, followed by seven others."
The room went really quiet.
Terwilliger drew breath and said "Followed by one through ten, right?"
"A thousand, sir. Binary counting."
Untitled
By Michael W. Hyde
Today on the NewYou.com hour our guest is scientist, author - and until a recent press release, recluse - Doctor Joeseph Veriton. Thank you for coming on our show."
"I'm delighted to be here, thank you for having me."
"Doctor Veriton, how did you manage to encode an entire human genome into a single kilobyte?"
"The short answer is compression. The long answer is I didn't; the DNA did."
"Could you describe for us the theory behind it?"
"Sure. DNA has four ingredients, and those ingredients are mapped in a series in order to create the infamous double helix. What happens is: incredibly complex patterns begin to emerge, so complex that we can't see them -- but protein-based computers can, because they contain many if not all the same patterns, but in a different order. We don't encode the genome, we encode the patterns. The protein can 'unzip' the pattern, using itself as a sort of template."
"And what is your proof, doctor?"
With a nod, three more Doctors Veriton walked on, stage right.
UPDATE: A late entry came in from Stubbe: a procedural animation with music! I haven't had a chance to see it, yet, as it requires a swish video card.
Two minute procedural animation with music
By Stubbe
Screenshot/Video forthcoming
Windows executable
movie
And here's a bigger version of Mona Lisa, still under 1,000 bytes, courtesy of Gabriel: