Slade - 8:31 pm on Sep 27, 2002 (gmt 0)

If you're talking about your site being yourdomain.tld, if you move hosts, you wouldn't get a new URL, just a new host. There is no penalty(known) for swapping hosts.

If your site is you.hostdomain.tld, you'll need to set up redirects to point people visiting your old site to your new one. If you do this you risk a lot of loss of links. If your site was apples.somehost.com, and you move to apples.spiffynewhost.com, you have to convince all the people that linked to your somehost.com account to update their links. As long as apples.somehost.com stays alive and points people to your new site, you won't lose anything. If that site goes away you could be out some links.