Google Earth Meets Second Life

Apparently, Google Earth now has a layer that includes user-generated buildings:

What you get is the best of 3D Warehouse's textured buildings uploaded by users, downloaded by default as you zoom in.

But the really interesting bit is as follows:

As speculated on Ogle Earth before, and now confirmed, Google is harnessing the creativity of its users to populate its Earth with 3D textured buildings, whereas Microsoft Virtual Earth is engaging in "central planning", with a concerted effort to map 3D textures onto models using technology from its recent acquisitions. Which is quicker and/or better will become apparent over time.

But what happens when a user deletes a contributed building from 3D Warehouse? I went looking for the answer in the terms of service, and the answer is quite clear (I think): Although you own your content, uploading it to 3D Warehouse gives Google a "perpetual license" to reproduce both the content and derivative works of the content, even if you later remove it from your account.

Which, of course, is precisely the approach that Second Life takes.