I bought a Bluetooth adapter for my HTPC
...and now it's sitting in a drawer because there really just wasn't much of a use for it. Yes, with enough f'ing around I got a Wii controller working for it... for a little bit... but there was just no compelling reason to keep it as the wireless keyboard and mouse work off their own connection-type and the Bluetooth variants of those devices cost 4x more.
It's a neat technology, but as the article indicates... beyond the Bluetooth headset for my cell I really just don't see much use for it. I'm sure it could replace all sorts of *EXISTING* wires, IR, and proprietary RF connections but someone needs to make those peripherals... and most importantly make them at a somewhat reasonable price point.