HDD encryption for Linux and Windows?

[Jizzle]

I dual-boot Linux/Windows with a shared FAT32 partition for data. Is there any (preferrably free) software that can encrypt/decrypt a partition that works in both linux and windows?

I'd like this to work transparently, that is, I maybe have to type in a passphrase once to mount the partition but then it should appear to the O/S to be a normal file system.

[kyle.tk]

http://www.truecrypt.org/

-kyle

[Jizzle]

http://www.truecrypt.org/

-kyle

perfect, thanks!