It now works in OS X as of 10.4.9! I tested on both my Dulie G5 and my MacBookPro.
Here are the steps I took to make it happen, pretty simple. But it took some playing around to get it.
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Open the Bluetooth Preference Pane, Click Devices, select your device and click Configure.
It will scan your device; Click 'Continue'
It should then display the Conclusion screen that will contain "Use as personal area network"
Click Quit
Click Settings and be sure "Show Bluetooth status in the menu bar" is Checked.
On your WM5 device connect your network using the Internet Sharing application.
Back on your Mac go to the Bluetooth icon in the menu bar, click and select "Join Network on <devicename>"
Your on! Oddly on my Macbook it shows under the Network prefs as a Ethernet Adaptor, but on my G5 it shows as Bluetooth PDA.
Thanks for the update Apple!!
