I've been working on developing a DNN based site for over a year now with a social networking component.  This whole performance issue really concerns me along with additional SEO concerns I have about how some of these DNN pages are rendered.

Last night I got to thinking that maybe my best solution is to have a different CMS like Umbraco on the front end handling the home page and most of the content pages.    Since CMS isn't a DNN strongpoint without additional modules this might be a good thing.

I would then create a subdomain which would be handled by DNN which would have the social networking component within it.

If I used Active Directory to manage users, which is supported by DNN and Umbraco, and the applications are both on the same server, would this work as I envisioned?    That is, a seamless user experience where once the user is logged in they would have no idea how the site is setup?