Here are 6 of my favorite Reason sites to find free resources, and get help from fellow Reason users.

www.reasonstation.net/

Great sites to get free Rex Files, Refills, Subtractor, and much more.

www.reasonforum.com/

www.kreativsounds.com/

Great Blog, with links to resources and reason video tutorials.

www.reasonbanks.com/

http://paranooyer.eigenstart.nl/

www.dorumalaia2.com/

Note: Propellerhead does offer a forum for user, but it sucks.
www.propellerheads.se/board/