I have 3 younger sisters, all progressing through different stages in the beginner to intermediate range..
I put together setups for all 3 of them. Two of them are on Burton bindings (Customs and Stilettos), paired with Ride boards (Compact and Canvas).
I think that Ride's Lowrize rocker is a great profile for beginner to intermediate riders. Flat between the feet with a pretty mellow rocker from contact points to tip/tail.
Also, this deal that evo has on the Canvas is hard to pass up..
Ride Canvas Rocker Snowboard - Women's 2011 | evo outlet