In my services field it says:
SDP Server, AppleAgent, Hands-Free Audio Gateway, Headset Audio Gateway, OBEX File Transfer, SyncMLClient, Nokia OBEX PC Suite Services, OBEX Object Push, Imaging, Dial-Up Networking, Salling Clicker
Paired: Yes
Configured: Yes
Favorite: Yes
Connected: No
Serial Port: Yes
Encouraged to play around again, I found out that while sending a file from a SE K750 i it appeared in iSync, while before it did not. I repeated the same with the Nokia N70: as soon I was having an active connection sending files and at the same time ordered it to add a device to iSync it accepted it.
Now bluetooth seems to be working, except for one thing. When I use Bluetooth to connect my iBook and iMac I'm able to send files, but I'm not able to browse the other computer. Again it say something about services....