I'd like to see one made with:

Fold over CB mount on one side (well, just a tab/hole designed for it, fold over mounts already exist)
Hi lift mount
Some form of solid flooring (don't care about removable)
A place to mount 4 lights up front, but designed such that the metal framing would surround the lights (I drive alot of brush/thick/small trails and drag tree branches on the top all the time)
Perhaps a small tab at the top front corners to run tree lines/wire?
Don't forget the rear light mounts too

Dealing with my 60" hilift and the need for a fold over CB antenna is the only stuff keeping me from getting a rear tire carrier... if you make a rack that handles both of those issues, I'll order a rack and a rear bumper right today!

What I don't like about that original calmini rack is it looks too tall and smallish... I'd want something that physically covers more of the roof (width) and doesn't stand up so tall... In the pics, it looks like they just strapped a milk crate to the top (a bit exagerrated)