Is there a way to turn off mouse acceleration??

I really like no acceleration, and i think ppl (specially the ones coming from FPS) would like too. Maybe we can hear some opinions on this topic

And the mouse seems to be software. Hardware mouse would be really nice since FPS wont affect the cursor.
Is a pain in the ass crafing with 30 or less fps with mouse acceleration and software cursor.. draggin and dropping like that is a pain!