Hey, everyone -
I hope that it is okay to announce this here, but I think that it's a really good cause.
One of our local high schools is running a fundraiser for their math program, and they are earning the money through a very cool pi t-shirt that they designed during the last school year. For every purchase, the school gets to keep $5. Their goal is, very appropriately, $3141.59. 
We have made the t-shirt available on our website in the hopes of generating more visibility for them. You can see (and purchase) the t-shirt here:
http://www.pidye.com/thestorezone/product_info.php?products_id=403 (click on the image to see a larger rendition)
Isn't it a great design? I about laughed my head off when I first saw it a couple of months ago.
Even if you aren't interested in the t-shirt itself, please spread the word!
Also, feel free to email your questions to josh.cummings@pidye.com, or you can post them here, if it's appropriate. Thanks!