I actually started out at The Purple Place (mp.com). There was a point in time where it was THE place to go for DT news. After the split, it got really weird there (I still stayed on, but it got to a point where I just... left). I didn't find DTF right away - hung out at a casual game forum, but I got bored with that due to their rules applying to some people and not to everyone and most everyone there didn't know who DT was (there was one gal who knew who Porcupine Tree was, though). That, and the gaming forum was mostly older ladies so...
FINALLY registered for this lovely place in late 2011. Should've registered sooner, as DTF is the best them, ever.