Topic: New addiction: Justin.tv
From the guys who brought you Kiko (that calender app): http://www.justin.tv/
Basic premise, Justin wears a head cam 24/7 and is connected to the net via an Ev-Do thinger when not at home... a camera is trained on him while he sleeps. You can chat live with Justin and his roommates when they're on the computer (I've been doing it for a few hours now since a late night TechCrunch post...).
Yes, this sounds like something from 1999, but the technology is a lot slicker... and it's relevant here because said technology is Rails powered.
Plus, you get an inside look at a Web 2.0 startup (they live in a building with a lot of other startup founders -- at one point last night Justin mentioned that the reddit guys live upstairs).