Hey all, I figure this may interest at least one of you:
I just bought a hard-shell case for my GAIA from this e-bay store: http://stores.ebay.com/Pocketrunks
A slightly more direct link to the product listings: http://stores.ebay.com/Pocketrunks/Effects-Pedal-Cases-Blowout-/_i.html?_fsub=261328017&_sid=22715207&_trksid=p4634.c0.m322
It was about $78 (including shipping), a significantly cheaper option than the official Roland ones. Plus, it seems rugged and fits the GAIA nearly perfectly. Look for one of the "EFFECTS PEDALS ATA CASE ID 28x14x6 H" listings, there's quite a few up there. I ordered it on the 31st and it came today. Nice.
PS. Hurray for my first post.