Database troubles?

i have 4 domains hosted with dreamhost, and all but 1 rely on databases. the one that doesn’t is working fine, the other three all show this:

Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.

All 3 were working fine last night, but now all three show the same message. I can connect the db’s using phpmyadmin, so i’m not worried about lost data… i just can’t use my sites… and what good is my data if my users can’t access it?

any help would be greatly appreciated, one of the sites was just launched and we hyped it up a bit among a certain gaming community… and the downtime is costing us interest and registered users