The "interface as a pointer" thing really threw me for a loop as well. It was bothering me so much (not knowing what was actually going on), and Googling was helping so little, that I actually hopped on the Go IRC channel. The guys on there set me straight in, literally, minutes. There's a great community around Go right now.

Other than that, though, everything has been pretty cut and dry. There really aren't many "gotchas" in Go.