Well, after being inspired by deattilio's idea, I made a paint rack too!
Here's most of the materials. $10 bamboo serving tray, $5 in wood, $3 for fasteners.
I sanded the wood, stained with a MinWax water-based stain that
I like to use for my model bases. It turned out to be a close match!
Then I clear-coated with spray can for protection.
Tada! Fits almost all of my paints. Now I can see them much better.
Note the handles on the sides, which will allow me to easily take the
rack on/off the wall, and carry it to a working table. I also slightly
angled the wood peices backwards, similar to what deattilio did, to
keep the paint bottles from sliding off.
Shelves were match-drilled. Like deattilio stated, you have to be careful
with the bamboo splitting. You have to pre-drill every hole. The
rack has wall hanging hardware, and some sticky pads so I can rest it
on a table without scratching things up.
Thanks for the idea, D