Interesting-you can't up load your stuff to Beatport though, right?

I meant this more as: where do most people-creators, listeners, whatever else-get there music from when they buy-not just download...

I've had good experiences at www.fuzz.com and www.projectopus.com. Both are free to sign up with and you can set your tracks for free or paid DL. ProjectOpus is a lot more thorough in ensuring that the work is your own and there is about a 24 hour wait period for the track to be available. Fuzz does not do this, but it is a larger community and has some big name artists on it like Bright Eyes and Rivers Cuomo (Weezer). Both are community based and act like an artist driven label (I think they both have plans to really make themselves a label, but not sure on that (read the agreement - you do maintain the rights to the work in both cases). There are many sites like this out there. I like to put my tracks up in as many places as possible.