Here are some links, in alphabetical order, that I have found both informational and very helpful.

[link=http://www.bevrc.com/]Birds Eye View RC[/link]
[link=http://www.flytron.com/]FlyTron[/link]
[link=http://www.fpvhobby.com/]FPV Hobby[/link]
[link=http://fpvlab.com/forums/index.php]FPVLAB[/link]
[link=http://www.hobbyking.com]Hobby King[/link]
[link=http://www.lowpricerc.com/]LowPriceRC[/link]
[link=http://www.rangevideo.com/]RangeVideo[/link]
[link=http://www.rcgroups.com/video-piloting-fpv-rpv-469/]RCG Video Piloting (FPV/RPV) forum[/link]
[link=http://www.rcuniverse.com/forum/forumid_486/tt.htm]RCU UAV FPV and Drones forum[/link]
[link=http://www.readymaderc.com/store/]ReadyMadeRC[/link]
[link=http://www.undcon.com/]UndCon – RC, FPV, Aerial Photo[/link]
[link=http://videoaerialsystems.com/]Video Aerial Systems[/link]