hrmmm... This may have turned out to be an interesting intellectual exercise, but I may have to switch things back from aliases to redirects. There are issues with the login/logout process across the portal page and forum home on the vanity domains. Those issues are not easily solvable, and the company that publishes that portal page code says not to do it and recommends redirects.
But more importantly, all of the SEO gurus are telling me that redirects to a primary domain is much, much better for search engine results than having multiple domains all aliased to the same content.
I won't be making any immediate changes in the next few days, so if anyone has any thoughts on this that aren't already in this thread, I'm all ears.
