MacGDBp is really great, but 99% of the time when you debug something, you have it open in the editor, and most likely you're very close to the line you want to have a breakpoint on. Given that adding the breakpoint in the editor usually just implies double clicking to the left of that line, adding a breakpoint in MacGDBp becomes really cumbersome.
I use Mac's quick search to search through the files of my project and then drag and drop them to MacGDBp's open file dialog. This works fine, but still, it would be a huge leap if MacGDBp could read the breakpoints from an external editor. Do you think that's possible in a future release?
A good work around is to drag a file from TextWrangler's Documents Drawer into the top pane in MacGDBp's Breakpoints window, then set the breakpoint required. This isn't an IDE but it beats the hell out of using bloatware like NetBeans or Eclipse.