The 6600 is a reall disapointment. This surely is the windows of mobile phones. Nothing seems to work on it the way it's supposed to. There's precious little documentation available and what's available is little more than marketing hype.
The phone even restarts spontaneously when you transfer files over bluetooth!!
The message boards are totally useless and you see the same question being posted over and over again - without anyone getting good answers. But the I have good news, i have run into all sorts of problems working with J2ME on this phone and often had to find work arounds. I plan to write up an article on it (don't hold your breath though) real soon.