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Yeah, I think Chad has the bases covered - sharing an account is really only an issue if you don't want Google to know that the two sites are connected. For example, if you're cross-linking a lot of sites, you might want to keep their ownership as separate as possible. Most of those cases are at least gray-hat, though, and often Google has other cues. In general, sharing an account is no big deal. Sharing the same IP address has some minimal risks (in the past, if a site on that IP was penalized, it could cross over), but even that seems to be going down over time. Now that we're running out of IPv4 addresses, shared hosting is a lot more common. Personally, I still like unique IPs whenever possible, but sharing a host is no big deal. I guess the only other exception would be from an engineering standpoint. If you were running two sites for reliability/up-time (in case one went down), then sharing a host would defeat that purpose. That doesn't sound like what you have in mind, though.

Thank you Keri for taking the time to look at my site. I was not aware of the nova site on my domain...and will have it removed.  Additionally I will research the "wildcards" issue and determine the best way to correct.  I'm reading that unless I intend to block pages from the Googlebot (which I am not) there is no need to have a robots.txt file? It appears the source of the original problem points towards a DNS issue with my host GoDaddy.  I will advise when I know for sure so that others who encounter this problem may be helped.