What version of Ubuntu are you using? You mentioned Maverick, but it should
work in Maverick as mine does. Perhaps you have a newer Wacom Tablet. Mine
(CTE-450) has worked in Ubuntu since 9.10 and most other recent
distributions. It does not work in Debian which has only kernel 2.6.27 or
similar, but it works in Fedora 12, 13, Mandriva 2010, Sidux, MEPIS 8.5,
PCLOS 2010, OpenSuSE 11 and Sabayon.

I used to have to edit xorg.conf, but no longer have to and besides Ubuntu
does not use it anymore. Go figure. Keep at it!