PowerTank does, it's what I use. When I got the PowerTank sidearm, I blogged about it here to give you tradeoffs. Granted, the 20oz sidearm is different from a 10lbs bottle; got a belt loop for it?!
thanks for the input.... i ended up going with a 1010 compressor, as it costed me less than a regulator,
and weighed less than my 10 lb gas bottle, and is smaller..... and the silence in between saw cuts is nice,
but the little compressor is pretty quiet....