To answer your question, it is not bluetooth, but "wireless", and fits into a USB port. Full info here:http://shop.skype.com/intl/en-nz/headsets/...k-wireless.html
I'm not sure the particular wireless adapter is supported under Linux, hence my question. No point in buying something if someone knows they don't work on Linux systems. OTOH, if anyone has used one and confirms it's Okay on Linux, then it's worthwhile buying.
When I asked the question on Skype Help, the guy who replied said he thought it would probably work, but I want to know for sure, not go on someone's best guess that might be wrong.