another thing to think about is that i'll be sending this out to all my label contacts with contact info from artists and hopefully others that have label contacts will be doing the same. the reason being that this could act as a kind of demo nearly and hopefully get some of the artists in touch with the labels or even better, have tracks signed by them.
go over to FOEM forums and have a look at the way they do it. they've had a number of differant artists signed by label on the strength of their compilations.. one that springs to mind is danial melhart (tech-house producer)