D-Link DBT 120 worked fine for me. No problems with Billionton Mini BT dongle also as well, as with Mobidick BDU-33 bluetooth transceiver.
These transceivers work both under Windows XP Service Pack 2 and Windows Vista. You don't need to install anything: just plug it in.

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With best regards. Maxim Vyalkov
Oxygen Software- Tools for your mobile phone.
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> Hi
>
> Anyone know of a vista compatible bluetooth dongle?
>
> Cheers.