quertyman, responded to your PM but just thought of something else. Unrevoked doesn't work with all versions of Mac OS so trying on a Windows machine is probably your best bet.
I have an HTC Incredible using 2.2 and I am using Windows 7 to do this rooting process.
I followed the excellent intstructions and everything worked fine until I reached the point of; On Windows (only), open the Device Manager and verify that you see the "Android for ADB"
When I do this I don't see "Android for ADB", what I see in the device manager under Android Phone is; Android Composite ADB Interface
Is this OK? Is it safe to proceed with running Reflash?