Gonum: 3 years (and a bit) old

It seems we missed the opportunity to wish gonum (and the gonum-dev mailing list) its 3rd birthday!

https://groups.google.com/forum/#!topic/gonum-dev/4_SrZsoMeBs

can you think of something gonum ought to have and doesn't yet? or better yet: can you think of something you could do for and contribute to gonum, as birthday gift ? :)

PS: Gonum is a set of libraries written in Go to enable fast, good and reproducible science.