If your site relies on traffic from search engines I would recommend using 302 redirects (temporary redirect) for some time. When the search engines have update

If your site relies on traffic from search engines I would recommend using 302 redirects (temporary redirect) for some time. When the search engines have updated their results to show your new domain switch to 301 redirect. The reason you don't want to jump right on 301 is that your old results will probably fall off immediately. At one time using 302's was a suspicious sign in the eyes of the search engines, but that is no longer a problem.