I love this live cd, you can also encrypt the free space with lux, very easy (and slow). Itīs debian based, with security programs and fast. Of course you can update the packages. You can download it in English, Spanish or Italian. I am using it everyday http://www.freepto.mx/en/download/
$8.00
Knoppix Live GNU Linux System 9.1 on Bootable CD / DVD / USB Flash Drive
$9.99
KNOPPIX 9.1 LINUX INSTALL & LIVE DVD
$9.99
Knoppix Linux Bootable OS v8.6 "Original Live Operating System" 16G USB Stick
$19.95
$9.00
Knoppix Linux Hacks Book (392 pages)with CD
$44.10
Linux Knoppix 4.0.2 Installation Disc
$29.99
Knoppix 3.4 Linux installation CD
$5.00
Knoppix Linux Bootable OS v8.6 "Original Live Operating System" 32G USB Stick
$20.30