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Overnight we dropped completely off the rankings.  I have no idea what happened.  I was excited we were doing so well the past 60 days and ranked for many keywords and long tails.   This morning we disappeared from 100% of the rankings.

What most likely happened: Your site was offline, Search bots crawled the site and found nothing responding with a 404 error, or worse a 500 level error. There is a good chance that your site could have been crawled multiple times, and thus the search bots deemed your site gone, and thus your rankings fell. The first and foremost thing you should do (and I assume you have) is restore your website. Being offline for only a few days should not have a long term effect on your rankings. It will simply take time for the search bots to recrawl all the links that you have built and determine that their is in fact a website on the other end of them again. You should check webmaster tools for any errors and possibly ping your sitemap against the engines. Otherwise, I think it is best to carry on as normal, the rankings should return within a few weeks. If I may be so bold, I would suggest looking in to a different hosting company, unless it was billing related, there is no excuse for going down for more than a couple of hours in today's market.