Our WP is hosted by Yahoo and WP is the main site. We're thinking of leaving Yahoo mainly because they don't allow users to have a .htaccess file. "Security," they say.
We've only used Yahoo, have spent the last few months learning how to make changes to files, css, etc. So, we've learned a few things and with the help of the codex and the people here, we can achieve things. We don't yet have a lot of content, so it's not a big issue, but we have built forums using bbpress and have made changes to a template. We don't register users (except ourselves, of course).
But, what we need to know is what additional things do we need to think about when leaving Yahoo? Because we have no .htaccess, how will this affect a move? I assume we'll have to do something differently after a move.