I've used the following package, per the instructions in the HOWTO.
bluez-zaurus_2.3-2.4.18d_arm.ipk
Actually, I also tried with packages downloaded from the BlueZ site. So far, the Socket CF Bluetooth version F card is identified correctly by "cardctl ident". However the dtl1_cs kernel module is not loaded automatically when the card is inserted. When I modprobe dtl1_cs, it remains unused. There is no diagnostic info in dmesg. So seeking reports of using this card successfully on a 6k, and the environment you're using.
Also, how do I increase the logging level? Seems like dmesg doesn't record most of the interesting activity that would be useful for diagnosing these things.