This is hilarious .. seeing everyone with 1500MHz machines running Windows 98.
C'mon guys.. What are you waiting for? Get a new distro of Linux and get Win2K and dualboot 'em.

But don't run win98 !! hehe.. seriously though, why run it at all unless you're playing old dos games that 2k has no support for? In almost any other case Win2K will be faster.. and it's better for stability and security..
It's your choice of course.. but I am just curious as to why anyone would still want to use Win98 at all. I find it annoying to use after using 2K for so long! I like the way 2K handles things, and the focus. I hate 9x for that.. You be typing something, and it steals the focus and you end up typing onto another window and having to retype your document/message again... It's quite annoying. In win2k this happens far less, so it's a lot less aggravating.

This is what I've found, at least.
As for WinXP... it's the WinME of Win2K.

It's still got a length to go. My cdroms didnt' work properly, it was slower overall, and had a very tacky user interface.

The slowness could be attributed to remaining debugging code, though. As for the tacky interface, I think they just messed up on that. I hate the new start butotn thing.. definitely will not be using that IF I decide to use XP in the future. Otherwise though it's cool, I like the overall look once I've tweaked it to my liking, but I kind of prefer Win2K's professional-like interface and setup. Setting up XP was a breeze, though, so I can't complain about that really.
Anyways.. I'm not on a CPU over 1.2GHz, so I can't say there's any problems, but by the looks of it, it's not happening to many people. But again, I don't know why anyone would still use Win98, with all its disadvantages. I find Win2K much better for me, even at 500MHz. =)