That would be the a20m, but I hope that my wireless card will work with ubuntu as well (I've decided to go with ubuntu instead of Debian). The trackpoint is another concern of mine, because I'm certainly not used to it, I've used one before and it doesn't feel right. I'm also hoping that 128MB will suffice for web browsing with firefox and listening to music at the same time, though I don't see how it should be a problem.
Also, say I'm planning on putting my /usr and /home directories on seperate partitions, so that a reinstall could be done without having to backup. Is there a way to have the partitions dynamically resize so if a partition needs more space it can have it?