Brewing with pumpkins can be tricky, because you need to add a lot of them to get flavor out of them, but not too much, either - or the beer will taste like veggies. Roasted pie pumpkins are your best bet - some people prefer to add them to the mash, others late in the boil, others still to the fermentor or secondary, or a combination of the above.
The Fiesty(sic) Goat Brewery est. 2007 & Clusterfuggle Experimental Ales est. 2009
Primary: Saison, Berliner Weisse, sLambic I, sLambic II, IPA, 70/-
Secondary: Orange Blossom Mead, Flanders Red I
Kegged: Fat Man Porter w/ 1469, Fat Man Porter w/ 005, Centennial Falcon w/ Conan, Centennial Falcon w/ Denny's, Barrel-aged Fat Man Porter, Belgian Dark Strong, Dark Mild