I hate to dump on Pownce for two posts in a row, since I respect the people behind it, but another important note about their desktop app: I absolutely refuse to install AIR, Adobe’s new runtime.
Ever installed Acrobat?
Installing system-level Adobe software scares me, for good reasons. I like my nice, stable, clean OS X installation. Unlike my Windows days, I no longer enjoy reinstalling my OS every 6 months to clean it out.
Making a desktop app in AIR isn’t a very good move right now. It’s a brand new runtime that nobody has. And it’s still in beta.