It would be greatly appreciated if plugin developers explained which version of windows they wrote their plugin for, and whether or not it had been tested on other versions. I don't know what the usage statics are but I doubt I'm the only one with win98 who would rather not have to download and install every plugin before knowing if it should work.
Along with that, if you need win98 testers don't hesitate to email me at millerbc at whitman dot edu.
stripe/ben