Woot, thanks for the mention. There’s a slightly more descriptive version (with additional pictures) posted at Instructables:

http://www.instructables.com/id/worlds-cheapest-i2c-i-squared-c-adapter/

I’m a bit swamped with other stuff at the moment, but when time permits I’ll be updating the posted code with support for Linux and examples for additional devices. That’s the good news. Bad news is that support for this method of I2C interfacing is just as spotty under Linux. Works great on my old ThinkPad A31p (ATI Radeon Mobility graphics), but no love on my Asus EeePC (Intel 915 graphics). Windows support is definitely feasible but is unfamiliar territory for me; might still happen somewhere down the line.

Posted at 3:24 am on May 14th, 2008 by pburgess

Wow, that is a fantastic hack. It actually sort of makes up for the virtual extinction of the parallel port.

Posted at 6:07 am on May 14th, 2008 by Just this one guy

Bravo! It reminds me of the old motherboard I2C hack.

I used to use an OpenServo on a motherboard I2C connection, at least until it caused some serious crashage (some I2C devices dont like to be messed with)

Another thing to be careful with is connecting 5v to a 3.3v I2C bus. This can cause the release of the magic smoke.

Personally, I prefer an open source USB to I2C interface. Much less likely to explode your motherboard.

Still, excellent hack!

Posted at 6:50 am on May 14th, 2008 by gigne

He is actually a she, look back on her older projects!

Posted at 7:28 am on May 14th, 2008 by Dude!

ladyada: yes.
phillip: doubtful.

read the first sentence of the story very carefully :p

Posted at 8:21 am on May 14th, 2008 by sackofcatfood

ladyada rocks! have you seen her design noir presentation at the ccc gathering last year? way cool…. way cool.

- Unomi -

Posted at 8:40 am on May 14th, 2008 by unomi

I so wanna make babies with her.

Posted at 12:30 pm on May 14th, 2008 by Vampyre

To make sure credit goes where credit is due.

Ladyada found this.

Phillip (the first comment) developed it.

Posted at 3:05 pm on May 14th, 2008 by Blind

too bad this isn’t free
http://www.nicomsoft.com/wini2cddc/

Posted at 3:37 pm on May 14th, 2008 by anthony

Yeah, I know phillip developed it and ladyada is the one who mentioned it. but still ladyada rocks and saying one wants to make babies with her is pretty offensive. you better watch out she’s not wearing that design noir jacket…..

- Unomi -

Posted at 5:24 pm on May 14th, 2008 by unomi

slick. I was ready to use a pic microcontroller to interface a laptop to the i2c tracking camera out of a wii remote. nice job, ladyada.

Posted at 6:53 pm on May 14th, 2008 by jimmys

i don’t see how its offensive. anyway it was meant as a compliment. smart chicks are hot. sorry if i damaged your delicate psyche unomi.

i2c is nice but its no replacement for a chunky, fat parallel port. i’d rather build a laptop from scratch than buy one that doesn’t have a big fat port on the back.

Posted at 1:22 am on May 15th, 2008 by Vampyre