why even bother?

The Power Mac G3 dates from January 1999... just short on _eleven years ago_. In those days Win98SE and WinNT4 roamed the landscape... It has a maximum (supported) OS of 10.2.8. (Think Win2K vintage...) If you put XPostFacto on a G3 you could run 10.3.x, but you might not like the results. (I certainly didn't. I put 10.2.8 back on in very short order.) Running 10.4.x would be painful, running 10.5.x out of the question, and 10.6 runs only on Intel. I'd say that Flash support on a 11 year old machine would be the least of your problems...

And, yes, I have a beige G3. 266 MHz. 768 MB RAM. (officially Apple supported 192...) 6 MB video RAM using a ATI Rage card. (Yes, 6 whole MB video RAM, it shipped with _2_ MB...). I've replaced the original 4 GB hard drive with a slightly larger 80 GB drive (note that it's impossible to install OS X onto a partition larger than 8 GB on a beige G3, to install the OS I had to put the drive onto another, newer, Mac and run the installer from there; it'll run just fine once installed but simply won't install). The only browser I have on that machine is MSIE 5.2.something, and I've not even tried to access the internet from it for _years_. I suppose that FireFox 1 might work, if I could dig up a copy...

I have this vision of trying to watch a YouTube vid on it....

'performance enhancements'

Is it too much to hope that Adobe will release a version of Flash that won't max out the processor on a Mac Pro?