Stopped Saving/Publishing Posts

As of yesterday, I can’t publish any posts or save any pages on any of my blogs.

The blogs are all still there, and I can log in and stuff.

However, when I go to write a post, Word Press says the post is saved, but it does not show up.

It takes insanely long to publish a post as well (like 30 seconds).

So, is the problem with my web host and not Word Press?

I seem to recall one instance where WP mentioned an SQL database error.

I have version 2.0.1.