Most touchscreens I've tried with PCLOS support single touch only, at this time. That has, I believe, a capacitive screen supporting multi-touch. There aren't a lot of multi-touch Linux applications yet. If that's not a problem, then you should be OK (it will essentially be like a mouse).
You could always dual-boot, for now, and get the multi-touch stuff under W...(the shipped with OS)
There are multi-touch initiatives, and I'm sure they'll work their way down into our favourite distro eventually...it's just a question of time.