First up at cobaltss.net is a copy of the SAE Power Certification for a 2008.5 Chevy Cobalt powered by GM's L850 LNF engine. This is the same motor used in the Saturn Sky Red Line, Pontiac Solstice GXP, and the aforementioned Chevy HHR SS. Also via cobaltss.net, we get a link to an official GM Planned Emission Certification doc that also lists a Cobalt with the 2.0L LNF engine (the planned certification is BIN5/LEV2, by the way). So, that's it. The writing on the wall says that a Turbo Cobalt is coming. And while we don't have anything to add, you might want to mosey back here very early Sunday morning. You know, in case anything new comes up.
[Source: GM Inside News, CobaltSS.net]