No, they cannot move and fire. So you move them into a good firing position on turn one, and light up your opponent's flanks or rear from close range on turn two. If you are charged, you can either flee, or do a really punishing stand-and-shoot. Outriders definitely have their uses, especially for the Empire general who has a more quirky tactical bent.
I still always take Pistoliers instead, though.
Also:
http://www.dakkadakka.com/dakkaforum/posts/list/216922.page with special reference to point number five.