Originally posted by supertrac oh and please don't tell me it depends on the sensor!
No it does not. According to Falk Lumo, the noise is caused by the VGA amplifiers that amplify the analog signal before it's converted into digital. Therefore, the most you can expect from firmware upgrades is improved noise reduction - that is, in the imaging engine. But Pentax has always been about details over noise, so I would not expect that either.
Like I said, best way is to deal with it. The K-7 has been out for about a year now. This is the product as offered by Pentax. Any improvements are bonuses.