[Today's dev blog][1] (29th December 2012) gives the first details of the [CREST API for EVE Online and Dust 514][2] which may eventually allow you to update skill training without entering the game client.

So keep your fingers crossed. I will update this answer with more details as they come.


  [1]: http://community.eveonline.com/devblog.asp?a=blog&nbid=73971
  [2]: http://wiki.eveonline.com/en/wiki/CREST_Documentation