The RPF is, quite simply, the premiere community for the discussion of replica props on the internet. Most of the postings deal with items from franchises like "Star Wars" and "Star Trek", but fans of lesser known media and literary sources will find like-minded people working on a variety of projects. Of particular note is the new "Paper Props" sub-board, which is filled with items from dozens of films.
Update: Here's Adam Savage of "Mythbusters" with a celebrity endorsement for the RPF, based on his insane quest to create an absolutely authentic reproduction of The Maltese Falcon. The entire presentation is immensely entertaining, starting with Mr. Savage's interest in dodo birds and careening into the production of the original falcon and it's connection with the Black Dahlia murder. The discussion about the RPF begins at 13:20.