There are alot of Live Linux dstributions. There is an very easy way to run a live distro from USB. Check: http://unetbootin.sourceforge.net/
Distributions with Built-in Support
UNetbootin has built-in support for downloading and installing the following distributions:
- Ubuntu (and official derivatives)
- 6.06 LTS
- 6.10
- 7.04
- 7.10
- 8.04 LTS
- 8.10
- 9.04
- Daily CD Images
- Debian
- Stable/Etch
- Testing/Lenny
- Unstable/Sid
- Linux Mint
- 3.1
- 4.0
- 5-r1
- 6
- openSUSE
- 10.2
- 10.3
- 11.0
- 11.1
- Factory
- Arch Linux
- 2007.08
- Damn Small Linux
- 4.4
- SliTaz
- Stable
- Cooking
- Puppy Linux
- 4.00
- gNewSense
- deltah-2.1
- FreeBSD
- 6.3
- 7.0
- NetBSD
- 4.0
- Fedora
- 7
- 8
- 9
- 10
- Rawhide
- PCLinuxOS
- 2007
- 2008
- Sabayon Linux
- 4-LiteMCE
- Gentoo
- 2007.0
- 2008.0
- MEPIS
- SimplyMEPIS 8
- AntiX 8
- Zenwalk
- 5.2
- Slax
- 6
- Dreamlinux
- 3.2
- Elive
- Development
- CentOS
- 4
- 5
- Mandriva
- 2007.1
- 2008.0
- 2008.1
- FaunOS
- 0.5.4
- Frugalware Linux
- Stable
- Testing
- Current
- xPUD
- 0.8.9