I have 7 websites hosted on a shared GoDaddy Server, and only 2 of them are returning this bad status. All 7 websites reside on the same server with the same IP. And these 2 problematic ones were working for years before the problem manifested on 9/16/2012. In regard to WMT -> Health -> Blocked URL's, the status of my Robots.txt is 200 (OK), but last download date is 9/15/2012 (before problem manifested).
I tried forcing my sitemap to be read, hoping that robots.txt would be accessed to, and I'm still in WMT "pending" state - this for the last 2 days. So, it looks like I'm stuck.