Hi Aaron,
Can you create a LinkedIn account ok? It uses similar code and would be interesting to compare.
Had you used any previous versions of WildFire? If so, was it working there?
Could you please open the "Help" -> "Support" --> "View Trace/Log" and send me any errors that are produced after you click "Get Pin".
It seems to be related to your combination of OS and Notes version. If you have access to a Windows Notes installation, then the quickest work-around would be to create the account there and copy the Tokens across manually.
I will look into this issue when I get the chance.
Regards,
Andrew