Database error

I made a post about two days ago and everything was perfectly fine with it. However, today, I just looked at my site to see this:
http://students.washington.edu/edpham/weblog/
Database error: [Got error 28 from table handler]
SELECT DISTINCT * FROM wp_posts WHERE 1=1 AND post_date_gmt <= ‘2004-09-23 05:29:59’ AND (post_status = “publish”) GROUP BY wp_posts.ID ORDER BY post_date DESC LIMIT 5
I have no idea what that means. The posts are there, but it seems like it’s not able to connect to the table where the posts are. Anyone know how to fix that?