db changes.
i found it pretty easy to change the old url to the new url. some of the more informative posts include–
http://wordpress.org/support/topic/change-url-5
http://wordpress.org/support/topic/updating-links-in-old-posts-when-things-change
http://gerardmcgarry.com/blog/wordpress-how-use-mysql-replace-url-your-posts
[i’m no expert. my wp competence is probably somewhere around intermediate. as for ipstenu’s safe tool suggestion, i did not use it but i’ll take a look at it. thanks.]
change at host.
if you have the old url at the host, but want to change to the new host you can do it–by yourself–in about 5 seconds at hostgator. i haven’t included a link since i’m not sure that is proper. if you need let me know.