Oh, the number of times I have mentioned how much I like Steve Blinn or Adona rack designs! Extruded aluminum exudes strength and elegance, gotta love those T-slots... but, the price, yikes!
Well, in my never-ending quest to one day build myself something along those lines, I came across this little gem of a site:
http://www.framexpert.com/
What's so special about it? A FREE download program that lets you build whatever you want using the t-slots. I've been playing with the erector set for about an hour now and it is pretty easy to use, especially given the fact that I have no experience with 3-D software whatsoever. It even provides a cost estimate of your build as you progress (which looks substantially lower than buying from the aforementioned gods of rack awesomeness).
Extrude aluminum and exude sexiness, my friends!