Thanks for the reply folks. I finally figured this out early this morning and got it fixed. It was a permissions issue as I initially suspected. Once I figured out what they had to be I was able to get in and change 'em.
The puzzle remaining is how the permissions got changed in the first place. The site was up working at 10:45am and down and out at 11:15 am. Guess I’ll have to wait for an explanation from support.
Thanks for the confirmation that the site’s working, Scott. No Bill’s on that site, though. It’s a site I did for one of my client’s; first try at joomla.