I've been using Skitch almost since the day it came out, and I really like it. I use it to share/comment on ideas, teach people what to do, keep notes on something I need to remember for a short while, etc.
I've only used the new 2.0 version a couple of hours, but it looks like the new version has removed some of the best features.
Ability to set privacy options on images (and if they are indexed by google by default, that is even worse..)
Ability to auto copy URL on publish (preference to choose witch URL. Direct, web, etc.).
Ability to upload to FTP (one of the nice