[Anonymous4C54D6]

This actually looks a lot cooler than the OP. :)

Edit: oh wait...chrome only

[afandian]

I think it's good. It's based on open standards, has a proactive and engaged organisation behind it and, crucially, a community of users.

Not to detract from the OP.

(Edit: It's an open standard. There are plugins for different browsers, a web interface and API)

[hyperion2010]

There is a bookmarklet that works for firefox.