I thinking to try Hot Spot in my Pre and have some questions.

First I must say Im using an AT&T unlocked phone outside USA (v 1.4.5) and with another carrier. What I need is sometimes used it with my Dell Mini 9 Ubuntu 10.10.

So, does it work with Ubuntu? I read some threads about a conflict...
Can it work with my carrier?
If so, where is the last updated info how to install it? Need I install it as an AT&T phone? I found some Sprint instructions too.