TrueCrypt 4.3 for Windows & Linux was released this week. Sorry, no Mac OS X version yet folks. According to the release notes, the major changes seem to be related to Windows Vista compatibility. It is now fully compatible with both the 32 and 64-bit versions of Windows Vista.

Since only the Windows Vista Enterprise and Ultimate Editions support the new Bitlocker feature, you definitely want to learn more about TrueCrypt for encrypting data if you use Windows Vista.