I've got a client with two domain names and we are just now starting the SEO process. Both domains point to the exact same site, and I believe the domain is being "masked" in that you typed in www.domain1.com or www.domain2.com and either will stay in your browser rather than redirecting and changing to the other. We've just redesigned the site so the URLs for all the internal pages have changed, and really I don't care about about trying to capture the link popularity from domain2 although it wouldn't hurt. My main concern is that there is some traffic going to domain2 via links on other sites, and thus I want that traffic still to funnel to us. Don't care so much about the link pop as its very little anyways... Should I just auto FW the domain via the domain registrar?
If you use a DNS solution (e.g. a CNAME record), old links will result in 404's returned by the new sites. You need to redirect requests for all old links so that the redirection would strip off the path and the file from the URL (or provide some intellegent mapping). J.D.