@magicbookworm - hmmm... I'll check that site out, sounds interesting. I also have a bunch of podcasts called "writing excuses" by Brandon Sanderson and... others
I think one of the problems you face by writing with others is finding a common style, but that is negligable in regards to having several minds working on the plot and more hands/heads to write stuff. We of course face the extra problem of not being native english, so we need more editing in the end