Nothing yet that I would have done differently about this desk: it's barely my second day with it and I'm just happily overwhelmed by the response its getting from the interwebs.
That said, if I had to design a desk all over again, I would probably do a standing desk. That NYT article on sitting as a lethal activity was definitely the last straw for committing to a future with less sitting.
http://www.nytimes.com/2011/04/17/magazine/mag-17sitting-t.h...
The problem is that I haven't yet the slightest clue into how to make an elegant standing desk, all the designs I've seen are pretty terrible.
Thanks for your kind remark :)