ugh, i hate that. i have some acne scars too. i rub vitamin E oil on them every night. it has helped fade the scars somewhat. beyond that, i'm not sure what to suggest....
alpha-hydroxy is good for this- there's lots of products that have it.
murad makes a good alpha-hydroxy face scrub and recently i've been using a neutrogena face wash that has a little bit of salycylic acid and also alpha-hydroxy - i use it once a day to help prevent/ take away redness and wrinkles and also zits at the asme time!
Also, Clinique makes a pen that clicks out some sort of cream that is supposed to help that, and Neutrogena (I think, it's one of the better drug store brands) makes a mask to speed it along. And, Perricone makes a cover up that has an ingredient in it that is supposed to help, but I thought the product smelled like it had gone bad. I bought it at Sephora, if you want to check it out...