Myspace's DataAvailability functionality is live at developer.myspace.com. Here is a test application from TechCrunch that should give you a feel for what is possible. I'm not sure if there are legal or technical restrictions that would prevent this, but one possible use of DataAvailability could be...

ActiveRain (AR), a large network of real estate professionals just announced they have launched “Outside Blogs”. Here is the initial announcement from Brad Andersohn, Active Rain Community Builder and GeekEstateBlog contributor. What is an Active Rain Outside Blog (AROB)? That’s ARspeak for a blog that lies outside...

This might be a little off topic and not relevant to the US market (yet), but it is "geeky" and pretty cool, so I'll post it anyway. Google MapMaker, which is Google's attempt at using its massive community of users to improve their Google Maps...

Here are a couple links worth noting -- Tracking the real estate web in real-time - FeedPot.com BIRDVIEW Widens On-Line Marketing Reach for Real Estate Brokerage Clients Introducing StepRep from MyFrontSteps How to Increase Your Blog Subscription Rate by 254% ...