Does the Server version of Snow Leopard have full functionality so that it can be used as a "normal" Mac if needed? I consider buying another Mac Mini in addition to a Macbook, partly to simplify connections to devices such as printers and external HDDs, but also to have a functional stationary computer when needed.

The Mini Server seems to be ideal for my needs, with two 500GB 7200 rpm disks and up to 8GB RAM, but it only ships with Snow Leopard Server.