The problem was in the plugins. I moved all my plugins through an ftp to a new folder, then went into the dashboard and it's back. I put the plugins back into the wp-content/plugin folder one at a time. These are the plugins I found don't work. The 404 notifier plugin does not work, gives a fatal error, feedburner same, wp-amazon is the one that gave me the 500 server error, and I liked that plugin I could grab products and put them right into my posts, azlite did the same thing but it's connected to amazon. All the other plugins that I put back have worked so far. But what is really weird is those plugins are working fine on my other site gogreensun.com, for the exception of the amazon plugin but it's not giving me the errors.
Here is a list of the plugins I am using that are working on theinteriorguyllc.com, the site I've had the problems with.
all in one seo
google xml sitemap
seo friendly pics
simple forum (not sure if really working, but no errors)
ultimate google analytics
wordpress automatic upgrade
wordpress database back up
Thats what is running so far for me, I would like to get the 404 notifier up and running though.
Oh ya, the problem I had last night also was my posts. When I would view my site, then click on on a post it gave me a 404 error and would take me to a generic page. So I change my permalinks to default and saved then viewed the post again and it worked, but what was really weird is I immediately changed it back to the custom and went and viewed and it worked, so don't know what that was all about but I'm just glad to be back up and running, well I haven't posted yet so wish me luck.
I hope this info has been helpful to you and wordpress.