There is now a Go tool for compiling sass via libsass bindings. You can compile Sass, sprite images (Compass compatible syntax) or link to this library for building your own tools.
https://github.com/wellington/wellington
For large Compass projects, the compile time is 4-5x faster to Ruby equivalents thanks to the speed performances of the C++ library libsass and using Go for image composition.
To use this, download the precompiled libraries on the releases page that do not require libsass. Or it is also available via brew install wellington
To build your own libsass, refer to the libsass project or there is an included Makefile in https://github.com/wellington/go-libsass that will take care of compiling libsass for you.
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SupersonicSpitfire:
There is also https://github.com/yosssi/gcss, which is written in pure Go.
