I can't say that I know of a dedicated Px4 Storm forum but there is definitely loads of info on the net regarding the platform.
What is it you are looking to learn? I have a full size in .45ACP and find it to be a very reliable, easy to shoot, simple to clean and very comfortable firearm. If you haven't handled one I would suggest going down to your LGS and fondling one, and as many other models as possible. Even better would be if you could get the chance to shoot one, and other models, to see how it fits you.
Member: NRA GOA
Est sularas oth mithas
"either way, you were guilty by association, so you were smited...." JD