Static code analysis is very important to save time and retain code standards.
We actively use Visual Studio 2010′s Code Analysis feature which is very close to FXCop 10.0. (It is better)
And the best thing is, we were able to add this to team build to enforce gated check-in to fail when rules fail
This is saving tons of time for us and prevent horrible code. Well it is not a guarantee that code will be great, developers can still find innovative ways of messing up the code but at least we have certain standards. On top of MS provided tools, the following tools also worth checking