server migration

Hi,

I am considering switching to WP, and the most important thing for me is that, if I do, it will be convenient to migrate my WP installation from one server to another.

When I say “installation”, that includes not only the entry database, comments, trackbacks, but also things like custom templates and graphics. I am on MT now, and what I hate is how I feel like the program has chained me to my hosting provider, who has gone downhill.

I know that (with MT at least) the convenience of migrating to a new server depends in large part on how well you organize your files to begin with. So I guess I’m wondering if that’s also the case with WP. Does it have the faciilty to backup all blog-specific (rather than server-specific) assets to a single file? Or does it at least impose a directory structure that facilitates this?