A lot of people have been saying it for years. Within the last day or so, Scott Andrew said it. Then Meryl said it. Now I hear that the Department of Homeland Security says it, or so it would seem (I couldn’t find corroborating information on the DHS site).
Security is becoming more and more important, especially given the rise in organized attacks that exploit holes in IE and Windows, not to mention Outlook Express (known around the Meyer house as Virus Express). It’s definitely worth looking into switching to another browser, if you haven’t already done so, and to strongly recommend the same to people you know. Firefox is most often mentioned as a suitable replacement, and it will even import bookmarks, cookies, and settings from IE.
Of course, you may get pushback that Explorer is required for this site or that one. Just point out that they can do 99% of their browsing in Firefox, and only launch Explorer for those few sites that need it. After all, it isn’t like IE will be unavailable—they couldn’t get rid of it even if they wanted to do so.