Well since I just bought the Sony Ericsson T68i, I needed to get a Bluetooth USB adaptor. Since the D-link was late and $40+ I looked on Ebay and found plenty in the $20 range and if you are patient, you can get them for less. Almost all of the sellers completely rip you off on shipping, but you still get them a bit cheaper. ($10 s/h on a 1oz item is a bit much) I have seen the Mistumi adaptors go for $20 + $8 s/h, which isn't bad, but I didn't have the patience for that.
None of them say they work with Macs, nevermind OS X, but I took a shot on a Windigo adaptor that matches my new iBook. I can't imagine that it won't work for me, but I'll let you all know in a few days.
<crossing fingers>