Your comments

>It's a hassle to setup in command line mode, esp. in MacPorts.

I agree, there should be a menu option to do this, the way there is in TextMate. I just added +1 vote.  :-)
I agree, it's a pain to have to create a new project, then manually select "Add directory to project". Opening a directory should automatically do those two steps.
This can't be that hard to implement. Without clicking to select a completion, the list is quite useless with long lists.
Looks like it is themeable after all, disregard this.
Surprising that ST2 does not support text drag and drop -- this is standard in most text editors.