Well, I researched this wire mesh/laminated acrylic idea I had discussed on the Hard|OCP forum. After getting together with some engineers I found out that in order to get the EMI shielding to work, the wire mesh would have to have a density greater than a 1/4" spacing.
So, that would be a lot of wires, and it would start to distract from the clearness, even though the wires are very thin.
On the positive side, the engineers got some literature out that showed some testing that was done(for some other purpose, not for computer cases) and it showed that acrylic (especially 1/4"+) probably had just as good, if not better EMI shielding potential than sheet metal.
Now, I didn't understand much of it, and they threw out a bunch of lingo that went over my head. But they finally turned and told me it looked like it was a non issue, at least to them.
I don't know what that's worth (probably nothing) but I just thought I'd mention it, since it seemed to be such a concern.