The Wacom Bamboo line is touch capable, but handling a notebook computer and a tablet at the same time is clumsy, in my opinion.

My wife typically uses the trackpad on her laptop computer with Photoshop when she's at home. She has an Intuos tablet, but she never uses it (more joy for me!) The Gimp or Serif or Xara should be just as useful as PS with the trackpad only.