will someone please explain why a 301 redirect shouldn't be used? A 301 will transfer the pagerank to the new domain. What's the big deal about that?
Google even recommends it if people access your website through different urls, like if I own the .com .net .org and want it all to go to the .com.
http://www.google.com/support/webmas...n&answer=93633
Why split up the pagerank between 3 domain names when the .com could be getting all of it?