I'have only seen few Dogme films, but from my first (Festen) onwards I was hooked. It opened up new possibilities for amateur filmmakers, showing that a film can have bad lightning, sound, etc. and still be great, and successfull and even get a theatricasl release.
Of course the whole vow of chastity is more an experiment, and a means for achieving new creativity, and I think it has worked, and given us some of the best films of the last ten years. And although you don't get a certificate anymore - who cares? Get hold of your hand-held camera and long live Dogme!