Okay, here's the status of x64. It's looking very good for Server 2003 x64, XP x64, and Vista SP0 x64, however we're not quite ready for Vista SP1 x64 and Server 2008 x64 (we're almost there - we have a resolution for an issue provoked by changes in the VSS framework which is being implemented at this moment).
We're likely going to allow interested users to participate in a beta program for ShadowProtect 3.2 x64. If you are interested in participating, then please send an email to support 'aht' storagecraft 'doht' com with the subject "ShadowProtect x64 Beta Program" and we'll add you to our list.
Thanks for your patience.