My question is this -I currently have another site designed using asp.net and was considering adding a forum to the site- to help and create some content for it. If I use vbulletin which is php the easiest way to integrate into the site would be to run it off a different host- and give it a (URL address blocked: See forum rules) url
how does this effect page rank. will the standard domain benefit from the forum- or only by people finding the forum and then finding the main site via a link on the forum.

Or I could use community server 2007 - which is asp.net based
anyone have any experience with that program?

How is vbulletin vs community server for SEO? or ease of use

Sorry for babbling- long day