In the long tradition of writing software to fix problems with hardware I've bought, I've written a Modem Script to let you use your Pearl as a Bluetooth modem under OS X.
Unfortunately, I can't post a link here until I've posted 10 times, so you'll have to go to the RIM forum on howardforums.com and search for the title of this post to download it. You can also find it linked off my blog, which is mentioned in my profile. Sorry for the inconvenience!
EDIT: Just wanted to note that the 8800 is also supported, as well as the GSM variants of the 8700 if you have OS 4.2.