Google Calendar sounds like it should be an interesting service - I've never had the personal patience required to use a tool like Outlook (or, back in the day, various other PIM applications). Heck, I have been hard pressed to manage a paper calendar (so much for my organizational skills). However - having a calendar app that ties in via RSS to my aggregator? That sounds interesting to me, and like something I could actually make use of. I'm setting some stuff up there now, and we'll see how it goes.