Filling a Cavity
Since I now have another Bluetooth device (my cellphone), I am retrofitting my principal computer for Bluetooth capability. I could have got a USB Bluetooth 2.0 dongle for about US$25, but there's a compartment in the case for a Dell-specific Bluetooth 2.0 module, and Dell sells refurbished modules for about US$20 (counting tax and shipping). The module, like a dongle, connects by way of the USB host interface, albeït not with a standard USB connector.
What I'd like to do is get something installed so that the phone would see the computer as a head-set, and the computer would alert me when the phone were ringing and so forth.
Another virtue of installing the Dell module is that the already present, built-in Bluetooth light will actually do something.