Hello,
To answer the question first, I believe that on line resources would be sufficient.
Now to sidetrack a little, it would be tremendous if distance study oportunities (or the possibity to use self study manuals, as Microsoft's or Cisco's Self Study track) were available.
To me this would be the best.
Some of us do not have the time to attend courses, or some others may live a long distance from Aruba training facilities, and to be able to study self or attend some distance learning course at one's own pace would enable a great many more people to attain proficiency in Aruba networking.
Best regards
Peter