try buy bluetooth headset la. but it's not a tested and proven
market, meaning we cannot be sure whether the headset will work
with ur pc until u've tried. sometimes they say support but somehow
i feel windows xp has bad support in terms of bluetooth profiles
available. in any case, u'll also need a usb bluetooth dongle to
play with. ur headset needs to be constantly charged as well. if it
fails, good luck to u and ur pocket. i wun even consider this
option.
if u're talking about usb wired headphones, there are many. my
company pc's all have them. we're using a SIP-compliant VOIP
softphone but it works well for skype and anything else. but it's
wired.
if u're into skype, get a pocket pc with wifi, install skype on it
and chat. easy.
skype phone is a wireless phone that connects to skype with ur pc
as the gateway.
there are many solutions available but i dun think u can accomplish
much with ur budget (which u have not indicated) and whether ur
cost-benefit is good or not. these kind of wireless VOIP solutions
can be expensive. do u really need the wireless and am prepared to
pay the premium?
i think u go comex and ask better.