their V2 dropped support for PowerPC macs which several people
So Silverlight can't possibly compete with flash because it doesn't support a hardware platform that hasn't been produced in 5 years now and already has negligible market share?
In Silverlight V3, things getting even more complex as the Win32/64 Silverlight V3 has more features than OS X 32/64 one
The only differences I'm aware of between mac and windows silverlight 3 are quite trivial
While mentioned, where is the iPhone/Symbian and even Windows Mobile support?
In the works . Admittedly, MSFT is dissapointingly behind schedule on this front.
Some of your complaints with Silverlight have merit. It isn't perfect yet, but it has made remarkable progress in the 2 years it has been out and most certailnly is a rival to flash. Flash had an 11 year head start and Silverlight already does just about everything it does and a few things better. Silverlight lags behind flash in market penetration and platform support, but at the rate it is going, it will catch up quite soon.