Seriously, that`s about it.
I`ve seen most of the contracts from the larger mp3 vendors, and essentially they are all standard and the same.
If you doubt any contract you see, you can pm me here and I can get my mate to check it, he`s PHD in law, specialising in contract and copyright.
Really the main issue is promotion.
You need to essentailly get outside of the net to promote, and don`t just promote online aAs everyone has a net label. So really you need to make sure you get really top production values and some good hype.
I`ve been seriously looking into this myself, but it a really really difficult venture.
I`ve now settled for a label with simultaneous vinyl and mp3 release, but offering video (mp4) for the online release as well, to make it something a bit more special.
Anyway, good luck mate.