ww2.powerrangersgateway.com/ - this is Adam's site, and it portals to a bunch of other sites. This is where I've gotten the majority of my MF, OO and JF pics, and he's pretty good about updating.
www.timeforce.ca - another message board where I get my episode downloads. They're free if you join the board, only problem is you have to have the VCD program to change them to wmv files so you can use them for vids
www.rovang.org/wg/wgindex.htm - Writer's Guide To The Power Rangers Universe - this site literally has just about everything you could ask for about the Power Rangers, it hasn't been updated in a while, so it's lagging behind on MF, OO and JF, but it has a LOT of stuff!