Mac Zealot alert!
Maybe YOU don't have a reason to run Windows, ever, on your Mac - but acting like your personal situation should apply to the rest of the Mac using world is total B.S.
For starters, some of us are trying to consolidate hardware. For far too long, I've owned at least 4 or 5 computers in my house. I had one system all configured special for doing music and MIDI work. (You can easily fill a whole hard drive with digital sample collections and multi-track recordings, and timing and MIDI latency are critical. Loading some other general purpose software on a box like this can screw up everything.) I've always had a laptop for when I need to take a computer with me. I've got a computer just for my kid, too. I have a dedicated "MythTV" box running Linux that just acts as my "Tivo on steroids" in my living room. And then, I have a "primary desktop PC" for everything else.
For the last couple years, a PowerMac G5 has been my "primary desktop PC", but there are a lot of things I can't do with it. Sure, I can live without some of them since they're rarely "necessary" -- but for example, I like playing Half Life 2 once in a while. Can't do it in OS X or even VirtualPC as it stands today. A new Intel-based Mac with an option to boot into Windows, however, would make it possible.
I've also run into quite a few limitations with my Powerbook laptop - all due to it not being able to run Windows natively. EG. Ever try finding good street mapping GPS software for one? DeLorme Street Atlas USA is considered one of the best products out there, but no Mac OS X version at all. They haven't even written a version for classic MacOS in years. And Microsoft never bothered to do a Mac version of their "Streets and Trips" software either. I've also got a device that lets you plug into the "OBDII" port on your car and reset "check engine" codes, run diagnostics on your vehicle, etc. Again, no Mac version of the software for it available.
Sure, viruses will come out for Vista in no time, just as they have for every other version of Windows and MS-DOS. But generally, these things don't just fly onto your computer at random and infect you. They're almost always due to users opening files downloaded from dubious sources on the net, opening suspect emails, or trying to use illegal file sharing software that installs more than they bargained for. By just booting into Windows when I need specific apps, and running OS X for everything else, I wouldn't expect to see any real issues from that front.
Les Kern said:
Why in the HELL do I want to run Windows, ever, on a Mac? And why are too many idiots spending their time thinking of making it work? Jesus, what a waste of effort.
This is speculation, but I'd bet my house that the first REAL Vista virus is waiting for Vista's release. So why would I want to destroy my productivity so I can run that vertical marketing crap-application that's only available on a crap-PC? I'll buy the crap-box from evil Wal-Mart. When it dies, I toss it, much like a used Preperation-H towlette.
There is no "best" in the WIN world. It's an abomination. Vista on a Mac is like having a mole on your skin that might one day turn to cancer.
Keep your mole.