[Gimp-user] gimp and ubuntu compatible tablet

[Alessia]

Hallo everyone,
I've a problem that I think many of you already had. I've decided to buy 
a tablet to draw easily and in a more efficient way.
I have two problem to solve before buying :

I need, obviously a GIMP compliant tablet
I use a Linux based OS ( Ubuntu 8.10 Intrepid Ibex)
Another problem is that I'm searching for a tablet not expansive.

I heard of the Wacon tablets but I'm wondering if  anyone had used  
other tablets .
Could you help me, also point me to an updated list of compatible tablets?

Thank you in advance

Alessia