Maybe USB-BT dongles will help. Or, if I'm correct, some clone of Billionton CF BT, which supports BT 1.2. I strongly suspect it's fake, but, if anyone is interested in such card, I'll post a link here.
P.S. With beta1 and Dillo my Socket BT/Nokia 6630 easily went up to 256 kbps (EDGE), so I'm almost sure it isn't software-related problem.
P.P.S. Yes, it's pretty unstable, connection ruins each 5-7 minutes, though once I was able to work ~25 minutes without problems.