I have had this TabletPC for a while. It came with Win XP (tablet edition) that gave me all kinds of problems, mysteriously forgetting password hints, speech profiles, and so on. Over time, it became mysteriously slow, and ultimately unusable. Finally, I decided that I should try to install Linux so that it becomes usable.
The first problem was that it has no CD drive. A really lousy decision on the part of Toshiba. I had purchased an external drive at the time of ordering the laptop, but it turned out that it won't boot from that drive. I was reluctant to try network boot, as it seemed a bit complex, but ran out of options as I could not get hands on a bootable CD drive. Other options that did not work include upgrading the BIOS (still can't boot from external USB-based CD drive), SmartBoot Manager (does not seem to recognize USB drives), and Wubi (got stuck for many hours during install and never completed -- besides, there does not seem to be an easy way to migrate to a Linux-only installation).
The laptop did support PXE installation, and as it turned out, it was quite straight-forward to get it to work --- may be a half hour of extra effort. The instructions here worked like a charm. The only trouble I ran into was that the default DHCP config file did not work, and I did not get a helpful error message. As it turned out, all I needed to do was to ensure that there was at least one DHCP address that it can assign to a client, and then it worked fine. Once DHCP was up and I set up tftp server, following the directions on the above page. The boot started and proceeded without a hitch from there on.
After installation, X did not work right -- it ran at a low resolution; The pen did not work either. I was able to obtain an almost-working xorg.conf file, and then edit it to get the right resolution, as well as the pen to work. Here is the correct xorg.conf file. Still, the display is off-center by about 2 columns, so the rightmost edge of the screen is cut off. But it is small enough and does not cause any difficulties.
Here is a page that lists lots of software that allows you to use the tablet features. I tried Xournal, but there were some latency issues that made it difficult to use. May be my machine is memory-starved (256MB), and you may have better luck with more memory.
Wireless worked fine out of the box. Hibernate works, but not suspend. Also, after resumption, the pen does not seem to work. Other things such as audio work fine as well.