Very cool! I think it's especially great that this is a browser plugin instead of a separate website. It's great when developers make things as easy as possible on users. Nice job, I'll be giving it a try!
This example is great, as it is open source and supports Firefox too. Maybe I'll do both browsers as well! This HN friends extension does most if not all of the primitive things that I will need to do, so I'm being sincere and I think it's a great publish.