The problem with having plugins be in Go is that dynamic linking of shared libraries (written in Go) is not very well supported right now with gc (standard Go t

The problem with having plugins be in Go is that dynamic linking of shared libraries (written in Go) is not very well supported right now with gc (standard Go tools, not gccgo). There are plans to address this post Go 1.4. There are, of course, hacky ways to do plugins without shared library support (gobs via rpc to other processes or whatever), but if it were me I wouldn't spend a lot of time right now working on a Go plugin system for a Go app.