What exactly are you trying to get them talking about? I Bluetooth with my phone no dramas and while I've seen rfcomm mentioned a couple of times and sites and stuff I've never used it anything related to it for BT stuff.
You want file transfers? Download + install openobex and obexftp. Then you can easily transfer files without a hitch, once openobex is installed it's simply something like this at the CLI
Code:
obexftp -b 00:00:00:00:00 -B 5 -p filename/jpg
Where -b is your device address and -B is the channel to use, I have an SE k700i and it's Obex channel is 5so you might have some luck with that. If you want something in a GUI-flavour, install openobex but then either kdebluetooth or gnome-bluetooth, depending on your environment of choice. You should probably find Slackware packages of all these somewhere on the net, good luck