We heat with wood so I can't be of any direct assistence (could never quite abide the notion of burning that stuff that looks like bunny food). That said, you might want to pop on over to hearth.com. There's a whole subforum dedicated to pellet heat.
http://www.hearth.com/econtent/index.php/forums/
I pop in over there on occasion and post inside of the wood heat forums. Nice folks. Very passionate about wood (and pellet) heat.