We’ve seen numerous spy shots of the Porsche Panamera, along with computer renderings from tuners and a teaser from Porsche itself. We’re guesstimating an auto show reveal by the Geneva show in early 2009 since it’s expected to arrive in markets later that year. A hybrid Panamera will arrive shortly after launch. A convertible and diesel version are also being considered.

Flickr user Hysterical Bertha recently spotted the Panamera and says it’s not unusual to see cars being tested on her steep street.

You can also check out the Porsche Panamera minisite here.

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Porsche Panamera seen in San Francisco:

Source: Flickr (via Jalopnik)