Well, I've completed 3 of the 9 classes in the songwriting course I'm taking through the local school board... the classes are interesting with a very wide range of people in the class. That's what makes it even more interesting as week after week we've been thrown in with others to collaborate on songs or even just snippets of songs (song titles in week 1 for example).
The instructor, Mary Ellen Gillespie, is a composer (not sure if she's been published in the pop song sort of area, but she has scored a film as a credited pro, so...). The others, I'm still meeting, though I've already made "friends" in MySpace with a couple of young songwriters who are very good guitar players and burgeoning writers with bands even... maybe they'll want to play one of my songs one day when they make it big...
In any event, you should check out these guys: Adriel (whom I'm currently paired with while writing some music/lyrics in class) is a member of Analog, while Matt is a member of Metacom (although he appears to be a member of many bands as well as running his own studio!).
May the Muse be with us all!