I have just moved wfhpro.com from a (self-hosted) blogger platform to wordpress. (Still writing a post on that exciting move!

)
Everything is now moved over just fine. But I am getting Internal Server errors plus some really slow load times about 1/2 the time. I assume this is happening for everyone else also?
wfhpro.com is hosted on GoDaddy, do you think the problem is with them?
I have installed a few plugins, and I am using a new theme, but I don't have any scripts or anything running that I know about! I've looked at the files and I don't see anything that doesn't belong there.
I have no idea where to look for the problem. So if you have any ideas please let me know!
Thanks