tedster - 3:32 pm on Oct 14, 2011 (gmt 0)

If you only 302 redirect the home page to the new domain, then you're not sending direct link equity or ranking power to the new domain root -- and the domain root usually has the lion's share of backlinks.

Google will usually not rank the target page of a 302 redirect. I'd say find a way to 301 redirect the original domain root to the new domain root.