Clevernick, I noticed your question in a different thread yesterday but didn't have time to reply then. I've not personally had any experience with them, but I've heard many good reports about lulu dot com. The way they operate appears to be clear and straightforward. They're a 'publish on demand' company and you can sell your work either as e-texts or as hard copy. From what I remember, they don't charge anything up front to register your work for sale but take a commission from each sale. It's likely a much larger commission than a regular publisher but then, there are no minimum print runs to pay for. As for whether they will publish BDSM material, I didn't look that deeply into their small print, but I was originally referred to them by another BDSM/erotica writer who was pleased with their service.

Anyway, I hope that helps. I'd be interested in hearing your reports if you choose to go that way.

Incidentally, erotica imprints such as Black Lace may now also offer e-text sales for authors. They're kinda like the Mills & Boon of the erotica world. If your writing is more hardcore, there's a company called Read Magic. They own the back catalog on Greenleaf Classics and similar imprints that specialized in hardcore BDSM fiction. They also publish new titles so, I guess they're also in the market to buy new titles.