I've been lurking for over a year and haven't really had anything to add until now, so here goes!
Like many of you, I agree that Maybin has pretty much one move to get to the quarterback; his speed. Fortunately, this is not his only strength. Maybin can influence an offensive line and the QB, and his presence is his greatest strength.
We know he is used on passing downs, so lets start with the nickel package.
It starts with Maybin lining up to the QB's right side, ala Robert Mathis. If Maybin can get a good jump, he will command the QB's attention. Hopefully this will buy a blitzing Kyle Wilson from the blind side that fraction of a second he needs to get to the QB. If Wilson's receiver is lined up on the strong side, then we can send Leonard and roll Pool (who hopefully will be in on passing downs over Smith) to whatever side Revis isn't on. In this situation, success comes from a poorly thrown pass or offensive line miscues. It doesn't have to be a sack, the goal is to disrupt timing.
Maybin can also be used to eliminate offensive lineman from the play. This will make the overload blitz more effective. Starting from a nickel look with only two down lineman (Mo Wilk and Sione), we'll have Maybin lined up to the QB's blind side standing up. His job in this setting is to draw the left tackle away from the pocket, preferably behind the QB. Wilk will line up in the A gap between LG and C, and his responsibility will be to attack the C, hopefully drawing a double team from the G. Now the blind side of the pocket is open, and we can send Harris and Scott to go and feast on the QB.
What do you think GGN?