If you want to see superb renders of Daleks, then Steve Redfearn's website is is the one to visit. His site is one of my inspirations. Seriously, this is as good as it gets.
Peter Labrow's site is the place to go to find links to other Dalek-related sites.
Chris Neale's work features some beautiful models of daleks from almost all the ages of Doctor Who. His site has been another source of inspiration for me.
This site provides a wonderfully detailed record of the actual Dalek props used in Doctor Who, and how and when they were modified. I've found it to be an invaluable aid.
Forums aren't really my thing, but I believe that Dalek World is the largest Dalek forum site on the web and they do make interesting use of my work. You might also like to visit the forum administrator's website, which offers a wealth of background information and photographs.