There were some specialized compliance and audit vendors I would like to highlight at this year's Burton Group Catalyst conference.
Sailpoint, has an excellent product aimed at providing enterprises with compliance auditing. Put together by the former founders of Waveset, they have a product that focuses on risk management, access certification and policy enforcement. It seems to be an well thought out tool able to quickly adapt to your enterprise.
NetVision also has a policy driven audit and compliance tool. It has the ability to query in real time Windows at the DLL level to understand what actually is happening. This differs from some of it's competitors in that they are not fully reliant upon the windows logs.