http://glui.me/ has been good for me - I use it to save/share via Dropbox, but it supports a bunch of services. Does one thing well and gets out of the way :)
I still don't understand all the hate for the new version of Skitch; taking a screenshot and throwing a few shapes and text on it takes less than 5 seconds. What's the problem?
is there a good alternative to skitch yet?