Got the idea from this:
http://www.bedroom-boards.com/
hey that's Dan's site. Cool dude.
You're still better off with a pedal board. Probably as small as your old attache case?
Mixing and matching later - changing the order? You can do that with a pedal board. Also helps if you have ample space between them.
If they're very close to each other, wired or not, there's the risk of scratches - pedals scratching off each other, cables scratching the pedals, etc. . - also applies to the old attache case with foam route.
Or, go old school, put them in the boxes and then in a bag or case. Which of course, is totally inconvenient.
EDIT: if you're going to put foam on top of the pedals, make sure it's not so thick as I read somewhere that it's not good for the knobs.