Still the same question for me, what about the Flash Player Penetration ?
Macromedia give a response here. But I didn’t found any other website giving information about it. It’s not that I don’t trust Macromedia nor Adobe, but i would like to have other source than them. Here are more information about their methodology :

2,000 participants, comprising a representative Internet sample responded to this survey. The study was evaluated at a 95% significance confidence level, (5% risk).[...]

The actual statistic that I got are not so much trustable because to few people come on my website, and this statistic is far to young to be interpretable anyway.
See the Metah Flash Statistic.

 

Adobe as just release the new alpha of the Flash player 8.5, the new actionscript platform (AS3) is supossed to be more safe, more simple, with better performance and with a better compatibility.
Download the new alpha from Macromedia labs.