I felt the same way about 98SE, but 2000 is starting to grow on me. I just installed it for the first time a month ago and am finding it as stable as 98; it handles large files without heartburn and the smaller cluster size seems to make finding and storing stuff faster. I much prefer 2000 to XP, which is too full of junk for my taste.
You can find all M$ Win98 updates available for download
here, if and when M$ stops listing them. I haven't been to the M$ website for a month so I don't know if they're still there.