As of October 2008, Alfa Romeo 149 is assumed to be a possible future street model from Alfa Romeo.
The prospective midsized hatch from Alfa is expected to look just like this:
The Alfa 149 is expected to re-use the Fiat Stilo chassis, alike the Fiat Bravo and the new Lancia Delta. The design seems to come from the Alfa 8C, which appears to be a trend with Alfa since the new Alfa Mito. Neither this information, nor the image is an official release.