Exactly what I was thinking as well, I could see people plugging into these and not wanting to leave. It's already what some people who have tried it have said they felt like.
Quite a few people mention the pictures were taken with a camera and uploaded at a later date, so GPS wouldn't have been a factor. With the amount of data Facebook has I wouldn't be surprised that they could do more than just use GPS information to place locations.
I upgraded from 10.04 over the weekend. The upgrade process went smoothly, and so did the first boot up. This is the first time I've had no major problems after upgrading to a new version of Ubuntu.
I like the small changes to the UI and the improvements to wireless support. I'd always have problems with wifi connections in 10.04, which was mostly fixed by installing wicd. This is the first release for me that's just "worked". For reference, this is on a Dell Studio 14z.