I take it for granted that most people know that you can only sync up to 3 Zunes to one Zune Pass. (which by the way is a blessing, I would think that limiting it to only one would be better business for Microsoft)

Anyhow, Technipages has a post about how to clear one of your Zunes off your account to allow a new Zune to be synced with your Zune Pass.

Read the rest at Technipages