I just built a Chrome extension for Vodpod.com. It builds off of the high-performance API I wrote last year, and offers some pretty sweet unread-message synchronization. You’ll get desktop notifications when someone you know collects a video, in addition to a miniature version of your feed.
As it turns out, Chrome is really great to develop for. Everything just works, and it works pretty much like the standard says it should. Local storage, JSON, inter-view communication, notifications… all dead simple. Props to the Chrome/Chromium teams!