Never thought about it this way, but they're certainly right on this end. There are going to be sh!t-tons of users out there on Win2K who're going to start craving all the new features of IE7, & where are they going to turn when they realize they can't have it? Yep...

"Asa Dotzler, the community coordinator at the Mozilla Foundation, said Tuesday that he hopes to attract many corporate Windows 2000 users to the Firefox browser, since they will be unable to take advantage of the improvements in IE 7."