Flash will be coming for Android, but only if you have the latest version, codenamed "FroYo." A public version of the new Flash 10.1 software is being made available for FroYo today, but FroYo is still in development in Google and a release date hasn't been announced yet.
Engagdet had chance to try a preview build of FroYo with the Flash player and it sounds like there are still some kinks to be worked out:
We have to say, it's really something to have a mobile browser that doesn't pop up little cubes with question marks all over the web, but we found that rediscovering Flash was much like reuniting with a high school friend; at first you've so much to catch up on, but then you realize how far you've grown apart. Adobe's pre-vetted list of Flash-enabled sites do a good job of showing off the technology, but we still can't help but think the interactive elements still have a lot of catching up to do. As for video, the stream is good quality but gets fairly choppy -- especially when you check out something "not optimized for mobile viewing." Some of the HTML5 footage we've seen via the same device shows up in crisper detail and fluidity. Battery and heat are also of concern: the pre-release beta we have, according to Adobe, lacks hardware acceleration. Ergo, our beloved handset got piping hot after about 30 minutes of heavy video watching, and the battery indicator in the upper right had a sizable dent.