I found these 5 video painting tutorial episodes on the web from Tracy Brady of tabstudio.com. The last episode was posted November 12th, 2007. Its a real shame there arn’t any more episodes posted, these are really informative and helpful.
The tutorials are hosted here http://brushordie.blip.tv, or click on the episode links.
Tracy Brady has a more recent blog here, the episodes can also be found on this site.