You may have already noticed them at the bottom of the page for a while now, but I've been meaning to make an official announcement about it.
Golden Sunrise
(http://img237.imageshack.us/img237/2934/goldensunriselogo.jpg) (http://goldensunrise.akuta.se/index.php)
A small but growing Golden Sun community formerly known as Golden Twilight.
Fire Emblem Shrine
(http://www.goldensunhacking.net/banners/feshrine1.png) (http://forums.feshrine.net/)
They're a nice Fire Emblem community with a small, but very informative, section on hacking the games as well.