I haven't heard the songs you are referring to, but I've always been a fan of controlled feedback. I actually just bought myself the BOSS DF-2 Distortion Feebacker. (I can't wait till it arrives!)
Another newer alternative is the Line 6 Dr. Distorto. They're a bit different though. (If you are interested I started a thread on this subject about a month back)
What Dags says about the broken pedal is interesting... Adam Franklin of Swervedriver apparently used a broken DF-2 to get the band's characteristic controlled oscillating feedback sounds.
Apart form those two pedals, I searched and searched and there seemed to be nothing else that seemed adequate for my needs.
The looper types seem (by description anyway) as too crazy for my taste. I like something a little more controlled.. I'll get the crazy stuff the okld fashioned way (guitar in front of the amp).
Listen here for my solo stuff
or here for my band
Fender Strat (made with Mexican tequilla), CS-2, v847 (modded), Whammy, Da Moaf, FL-99, Stereo Memory Man, DE7, Traynor YCV40WR with matching cabinet