French blog Galaxus has uncovered an FCC filing for the "ME370TG" - which pretty much gives this device away as a variant of the Nexus 7, and if you dig into the FCC test results, we can see this confirmed:

As with most FCC filings, there really isn't much to say here - but the ME370TG is set for a certification date of October 29th. Which, as we all know, is the day of Google's big NYC event next week. A 3G Nexus 7 (sorry, no indication of LTE) seems imminent at this point.

FCC via Galaxus