It's easy to use, and seems to do what it says on the tin, which is to post to ping.fm (and let ping.fm post to other networks for you). This is damn convenient for updating to various blogs and social networks using one interface.
Annoyances: it calls the different keys that ping.fm's API requires by different names than ping.fm, though I'm unsure if that's due to API changes by ping.fm or not. (Their own documentation isn't so clear on this.)
More annoyances: the online tests use a psychotic amount of dependencies.