You doubt it?
I know it is.
If you want to go DD-only, which is the only model that makes sense now, you have very few choices:
1- Steam
2- Impulse (Gamestop download whatever)
3- GMG
4- GoG
5- Desura
There are other portals but they are strictly for casual games.
To break onto Steam is a long process and you're not guaranteed a response due to the fact that there's a SHIT TON of people who are applying. I doubt Impulse does major indie now without a "publisher", and I don't know enough about the publishing process for the other 3. GoG just recently started to sell indie games, Desura is majorly unknown at this point, so the only other way to sell it is to sell it yourself, which is LOL-worthy in terms of sales.
You can't self-publish on XBLA, PSN submissions are a fucking pain (I've done a bunch myself, believe me), and WiiWare is DOA.
What's left? iOS. Costs 99$ a year to publish any amount of titles on the App Store, very little cert process, the devices to test on are easily accessible and affordable, and the only "real" requirement that is annoying is having a computer running Mac OS, which is easily cut down by buying a Mac Mini for like 600$ and modding it so it has 8 gigs of ram.