Bamboo certainly looks worth it, especially for improved pressure and resolution. Surface size, you might not like, but that makes it very portable, especially with the detachable cable. I'll be getting one myself (quite the downgrade here actually, after my pro tablet
but the size advantage and satisfying precision makes up for it nicely enough
Bamboo is targeted for general input tasks rather than specific graphics uses, similar to the lastest graphire4's with 512 levels of pressure sensotivity. 2 packages avail if im not too wrong
Bamboo: 3.7x5.8-inch active area
Bamboo Fun: either 3.7x5.8- (small) or 5.3x8.5-inch (medium) active area (medium is the much better one to get)