Linpus Lite is a Linux distribution geared toward netbooks and low-power computers such as tablets - version 1.4 is the newest version, and according to LinuxBSDos.com, "it is one of the best distributions" that the site has yet to review.
It boots fast. It shuts down fast. And it has a "slick installation program."
But aside from these must-have features for a tablet operating system, the folks at LinuxBSDos.com review the security features of the Linux distro, such as its Grub implementation and the firewall (IPTables/Netfilter).