BlueSky - 11:43 pm on Nov 12, 2003 (gmt 0)
A 302 means the info resides only temporarily at the other location. If you don't plan to go back to 2500 subdomains, then I recommend you use 301's (move permanently) instead. You may see a time lag from when Google drops your old pages until it picks up the new ones but your pagerank and SERPs should be restored back. The 301's will tell Slurp those subdomains don't exist anymore.