I just bolted on the N2 CMS to my existing MVC 3 Razor site. So far no problems, things are editable etc. The only thing I'm missing is how to show the N2 control panel on the actual site rather than going to the /N2/ folder of the live site and editing things there.
Libardo, the lead developer of the N2 CMS hints at an HtmlHelper here http://n2cms.codeplex.com/discussions/232192 but I can't find it anywhere in the source code. I could likely roll my own but was just wondering if someone already did this or knows where the actual N2 version of the helper is.