with fxsol you can do up to 400:1 leverage and they credit/debit carry interest on positions. I don't know how good the rates are compared to other brokers...probably not that great since they allow it on 400:1
i like the fact Oanda pays interest on balance. thats a plus. but what about their rates? are there any brokers with competative rates that are the same or beat oanda? are there any brokers that pays interest on carry trades and balance?