Their website isn't down per say, the site admin has changed it twice the last few days since he saw them letting apps pile up when he can see their log in times.
He merged it into a gaming community at first, STO, SW-TOR, and others; but now it's a tech and gaming thing. http://www.techizone.net/forum.php is the new address. If you already had a forum name for STF Raiders, it still works there.
Haven't heard of anything else like what the STF Raiders were, so name a few if you could please. They're obliviously not using the looking for fleet forums much.
The best I am finding now are fleets that have a division for STF's. Right now I am going for 12th Fleet, they look like a robust fleet, they do just about everything.
I'm also looking to join a raiding fleet. I applied to the Honor Guard Raiders a couple of days before their website went down, so that's not happening. I run elite STFs both ground and space daily. I'd be willing to form a fleet with some of you guys, I can pitch in EC for bank tabs as well if needed. Shoot me an STO mail or PM if anyone is interested.