http://support.fujitsu-siemens.de/forum/viewtopic.php?t=17477

In the official Fujitsu Siemens Computers N560 forums, some people have reported success with installing the well-known WM5 x50(v)/x51(v) Axim Widcomm BT hack (project originally initiated by me) on the N560, with all its goodies (for example, OBEX transfer, BT PAN etc.) This also means the same Widcomm stack may also work on the other N500-series devices (N500, N520) of Fujitsu-Siemens - and even on the C550. Over at FirstLoox, some people have also reported on the success (and, in cases, failure) of the hack. Unfortunately, the third most important Fujitsu-Siemens-related forum at the (German only) ppc-welt.info doesn't have anything (as yet) on users' attempts at installing the Widcomm BT stack on their N5x0 series devices, including the N560.