onak is an OpenPGP keyserver written by Jonathan McDowell as part of Project Purple.
I've been working on adding support for dynamic backends (i.e. you pick the backend at run time, instead of compile time). I have just finished getting this working, and expect Jonathan to look at my code when he has time.
If you would like to try out my version of onak, please get it from my arch repository as follows:
$ tla register-archive http://www.sommitrealweird.co.uk/arch/arch@sommitrealweird.co.uk--2005-external/ $ tla get -A arch@sommitrealweird.co.uk--2005-external onak--dynamic-backends--0.3