I've used iPhone SDK and tools for several months. XCode seems pretty nice, but there is one tool which I don't get: FileMerge. How can anyone use it for comparing files or doing merge?
Seriously now, what do you really use?
My use case is subversion database on remote server, few local developers working on same project as well as few remote developers. Cannot call/talk each person separately to ask what did they do, must have usable file/folder diff/merge tool. Looking for graphical version control front-end, which integrates nicely with XCode.
I would prefer Beyond Compare myself, been happy user for years, but it's not available for Mac OS X (yet).