I've been using middlecoin.com, so I have no idea which coins I'm actually mining other than they are scrypt coins.  It mines whatever is listed as the most profitable coins, then converts them to BTC, and pays out in BTC only.  It has worked great except for the last few weeks has dramatically slowed down.  In fact, I don't think I've had a payout from them for about 6 days.  Usually I get one every day or two, sometimes three or four.

MTP