Go also works very well at STARTeurope, powering our event-platform http://startuplive.in/
Developing a high level webframework from scratch just for one website was a bit of a crazy undertaking: https://github.com/ungerik/go-start
(sorry, the documentation needs a big update and a tutorial. Most time was spent on running stuff and shipping features...).
Garbage collection is actually a lot easier with 64 bit pointers, since the odds of a random collision between pointers and non-pointer data goes way, way down. And because the ratio of memory in use to total address space goes down.
