A "living mosaic". You send pictures directly up to the site and it instantly updates (well within a few minutes).
If you have a txt message plan and can txt photos you can instantly add pics on the fly to the Big Picture Project Living Mosaic. Just take a pic and instead of texting to a phone number enter the email address bigpicture[at]localsrock.com.
If your phone plan includes email you can email shots up or just log in to your regular email and send pics from there.
Anything and Everything. The mosaic is really about visually capturing our world. It's kind like Twitter.com but with pictures and it's made of up everyone's pics, so you see what everyone one sees. It's like seeing the world through a funky kaliedscope.
When you send a pic- describe it in subject line of your txt or email. It makes it really interesting when you look at the whole group of pics to know stuff like - where is was shot (city/neighborhood), when (2am), and what made you send it (omg look at this billboard).