[Tfug] Encrypting the WHOLE DISK - practical?

[Jim March]

Folks,

My laptop only has a 60gig HD.  It's split now into 57gig boot and working,
2gig swap.

I've tried to split off /home into another partition but, I can never really
be sure how much data vs. programs I'm going to be playing with.

Now I've got a bit of a crisis: I've been hired to go onsite to another
state and investigate a group of scammers.  Long story I won't go into but
the possibility my laptop will be taken is moderately high.  I need a simple
method of doing whole-disk encryption.

Plus somebody else doing election oversight just got burgled of a single
thing: her laptop's hard drive.  Which was replaced with another, similar
drive, although blank.  Wrong brand though.

My main partition is now Ext3.  If I have to reformat in XFS or something I
will, but...I need to do something quick here.

Tips?

Oh yeah, I'm running Ubuntu Feisty Beta right now.  (GREAT stuff by the
way!)

Jim