I quit using the Mac platform in the mid 90s after having a series of hardware disappointments (PB 5300, Performas, etc.). But I also wanted the Intel platform to get on the Linux bandwagon, and I used Linux as my home OS almost exclusively until Dec. 2001.
When OS X became a shipping reality, I went out and bought an iBook, and convinced my GF to get a new flat screen iMac.
OS X is a geeks dream come true. The power and stability of UNIX, and the "it just works" engineering Apple is famous for.
Coming from the Open Source/Freeware world makes it difficult to through down cash on an OS, much less an upgrade. The difference is, of course, OS X works they way it's supposed to 99% of the time, unlike nearly any Linux distribution I've used. And the OS technology is awe inspiring. Set up an Airport network in your home and you'll see what I mean. It's just so elegant.
Anyway, I'm not the richest guy out there, and the upgrade to 10.2 is more than I'd like to pay, but I pre-ordered it on the day of the keynote because Apple's finally done something that really is "Insanely Great".
So, people, quit whining about how expensive 10.2 is. You get a COMPLETE operating system for $139, and with all the discounts being offered, you're not gonna pay that much unless you're just plain lazy.
Try getting a complete OS with the quality and flexibility of 10.2 from any other vendor, save the Linux vendors for that price. Not to mention the ability to add thousands of free application with OpenSource. Heck, with the discounts, OS X 10.2 is competitive with the retail boxed editions of some Linux distributions.