Jason Kottke writes about a cool idea by Greg Elin: “He wants a way to dump calendar items, tasks, and the like out of his calendaring system (iCal, Outlook, etc.) and have those items display as ads on the web sites that he visits. So, when he goes to Slashdot, a banner ad tells him to stop for orange juice on the way home. When he goes to news.com, there’s an ad telling him that his mother’s birthday is coming up.”
It’s one of those “wonder I didn’t think of it” ideas! Takes relevant advertising to its logical end.