Come and try mining XMR at
http://cryptonotepool.org.uk or at least read our info page for some pointers - its a CryptoNote based coin so there are some fundamental differences to mining Bitcoin derivatives.
Its debatable whether the algo still really favours CPUs, the latest GPU miners are getting pretty efficient, but if you have access to a number of good CPUs then it can be profitable - at least 3x more than other alt-algos.
If you need any help getting setup feel free to contact me directly