This is big, I mean really big

Google's MyMaps launch yesterday is bound to cause a social networking revolution similar to what MySpace did a few years ago. OK, maybe not that big, but it's definitely gonna be big impact for all (or most) of the new real estate vertical search engines, because - to some degree, GOOG is now letting Joe Public do for himself, what Nestoria and others have been doing/developing for us in recent months/years. Plus GOOG have the marketing clout (i.e loads and loads of cash) to completely obliterate anybody who stands in their way with a similar idea. I honestly dont know how MyMaps will affect business models of the new vertical searchsites, but it will most certainly affect the way they plan to make money, and more than likely their future potential in raising venture financing and much needed liquidity.
Joel Burslem, writing for Inman's blog, gives some insight in what we may very well see in the not too distant future:

MyMaps ... allows anyone to create a customized map and turns all of us into potential cartographers. Using the service you can quickly add placemarks and draw lines and shapes to show boundaries or routes on a Google Map, instantly creating your own mashup. You can even embed photos and YouTube videos.
MyMaps' applications in real estate are endless in my mind; a buyers agent could create an map of all the properties they wanted to show a buyer and email them a link of the route they'll be taking. Or, a broker could create a map of all the open houses they might be showing on a particular weekend. Any other ideas you can think of?
The only thing missing from this release is the ability to embed your maps in your own web site or blog but I suspect that it won't be long before we can.