Full-disk encryption: PGP v. WinMagic for Mac+Win7+XP

[Rich Graves <rgraves () CARLETON EDU>]

(refreshing the every-6-months thread)

This small liberal arts college is (finally!) looking to deploy full-disk encryption more broadly. We require support 
for XP, Windows 7, and OSX Leopard and Snow Leopard. All users are in a Win2k8-native AD.

We had been hoping to get away with BitLocker and FileVault (continuing legacy use of TrueCrypt for XP), but FileVault 
was disqualified because our LiveBackup deployment has the side effect of caching files outside the home directory in 
cleartext.

Because of prior relationships and buzz on several non-.edu lists, PGP and WinMagic are at the top of my list. 
Obviously, PGP has significant market share. WinMagic is newer but has has been mentioned on this list, but usually in 
a "look at" or "we are evaluating" context.

I'd be interested in off-list responses on WinMagic v. PGP. Or name a favorite vendor that supports XP+Win7+Snow 
Leopard, if you had reasons for disqualifying both of my finalists.
-- 
Rich Graves http://claimid.com/rcgraves
Carleton.edu Sr UNIX and Security Admin
CMC135: 507-222-7079 Cell: 952-292-6529