This looks unofficial, but Github has a version that has updates over the past few years:

http://github.com/ato/nailgun/tree/master/nailgun/

and yet it functions perfectly with no problems when I use it in the VimClojure plugin. Tex hasn't been "updated" in ages either yet its fully functional. Sometimes software is just done and no further activity is needed. Judge it on whether it works not the date of the last commit.