We use a standard bitcoind with the coincontrol patch. Outgoing transactions use whatever fee it chooses, sometimes it is 0, other times it can be as high as 0.002, but the majority have been 0.0005.

If someone patches bitcoind so that you can set the fee in sendfrom, sendmany, or sendtoaddress please let us know because we are more than willing to add an option on our site.