I found something kinda cool for storing loose figures -- picked them up at Wal-Mart. They are open-front, stackable tackle boxes with removable cases that slide in and out. You can slide 4 cases into the front of the tackle box, and the cases are basically just PLANO 3700-type cases.
What's nice is you can stack these things (or even hang them from a wall, they have holes for that) and you're still able to slide out the cases on the very bottom. Really convienent, and the cases hold most figures, except the really large or action-posed ones. Probably much like the Plano cases. And the tackle boxes have handles too.
They're like 15 bucks each and in the Fishing section of Wal-Mart. There are two sizes -- the blue ones are the larger ones that I use, and then there are smaller ones that won't fit figures -- these are black or maroon, can't remember.
I'll try to post pictures, but if you're in a Wal-mart, check them out. They really made my life easier with all these loose figures. I just have 2 tackle boxes (8 cases/128 figures) for each movie, and 2 for EU. Works GREAT, and might be a little easier to deal with than just loose plano cases. Hell, the plano cases might actually slide into these things, I don't know.