I have a TrimSlice that came with a Bluetooth USB 2.0 Dongle, just plugged in in my system to see if Windows 7 recognized it and came up as CSR Bluetooth Chip. Device type: Bluetooth Radios, Manufacturer Realtek Semiconductor Corp.
Hardware ID: USB\VID_0A12&PID_0001&REV_0134
It looks the same as Psi but it's grey color, but I have not taking it apart. Internet searches for a Realtek Bluetooth USB 2.0 dongle shows them all with black plastic like Psi's.
Totally forgot about it until I saw the picture on this thread
I guess my desktop now has Bluetooth from now on