Not tested but reported to work with kde-bluetooth. Enable the following in your kernel:

Networking  --->
    --- Networking support
    Networking options  --->
    [*] Amateur Radio support  --->
    <M> Bluetooth subsystem support  --->
        --- Bluetooth subsystem support
        <M> L2CAP protocol support
        <M> SCO links support
        <M> RFCOMM protocol support
        [*] RFCOMM TTY support
        <M> BNEP protocol support
        [*] Multicast filter support
        [*] Protocol filter support
        <M> HIDP protocol support
        Bluetooth device drivers  --->
            <M> HCI USB driver
            [*] SCO (voice) support
            <M> HCI UART driver
            [*] UART (H4) protocol support
            [*] BCSP protocol support
            <M> HCI BCM203x USB driver
            <M> HCI BPA10x USB driver
            <M> HCI BlueFRITZ! USB driver
            <M> HCI DTL1 (PC Card) driver
            <M> HCI BT3C (PC Card) driver
            <M> HCI BlueCard (PC Card) driver
            <M> HCI UART (PC Card) device driver
            <M> HCI VHCI (Virtual HCI device) driver