Your home page is still in the index:
http://www.google.com/search?q=www.locusld.com
But yes, your not in the SERP's for locus long distance.
It could be a hiccup and your listing could come back tomorrow or six months from now.
My best guess, and it is only a guess, is the way you link together all your sites at the footer. I've heard rumors that Google may penalize for networking sites like that.
That's the thing that sucks about Googles SERPs. No one knows what the hell is going on. One day your on top of the world and the next day your being squashed by the Google behemoth.