To be clear, I was totally talking pie-in-the-sky in my "proposal"
peanutgallery, now that you mention it, that does make much more sense for the Raiders and Niners to share a stadium. It would be nice to get the Earthquakes in on that action too.
pesto, yeah, my proposal was pretty outlandish, but one of the redevelopment proposals is going through anyway (Hunters Point). The only question now is whether that redevelopment will include a new stadium for the 49ers, or whether that stadium will be in Santa Clara. I'm not really sure what the problem with Oracle Arena is (or if there is one, really), it was gutted and re-done not too long ago. The location is pretty abysmal, aside from decent access to BART and a perpetually choked freeway, but the facility itself isn't too bad.
When I mentioned the Uptown site for the A's, that's really the most outlandish, as it's not even a possibility now. Developments have already been completed on that piece of land. As of now, I think the best spot for the A's is near Diridon Station in SJ. Just as basketball and baseball feed off of each other well (in terms of keeping a neighborhood active more of the year), hockey and baseball do the same.