You'd hear of Norco if you're on a budget, they're one of the many cut-rate brands. Supermicro charges roughly three times the price for enclosures, which do get the job done if you aren't bitten by firmware issues, but are by far not a budget brand compared to the competition out there.
I've actually considered some Norco enclosures in the past for a hobbyist project, but I had concerns over their hot swap backplanes -- mainly, a lot of reliability issues reported. Catching on fire pretty much settles it!
I've used http://www.aicipc.com/ for low-end. Or Chenbro, or Antec. (and eBay, or craigslist, or otherwise sourcing used stuff getting thrown out at a datacenter)
Thanks for the AIC pointer, it's hard to find much useful info when you're essentially ordering equipment from the finest brands DealExtreme has to offer.
Besides Supermicro and Chenbro and Dell and HP and IBM and (whats left of) Sun, who else is there to buy from? There doesn't seem to be any other brands anymore.
ASUS makes server mobos, but not cases (I'm not sure who's cases they're using for barebones units), and Antec makes low end server cases, but no barebones, and Intel makes pretty horrid server mobos but use someone else's cases for barebones.
I've actually considered some Norco enclosures in the past for a hobbyist project, but I had concerns over their hot swap backplanes -- mainly, a lot of reliability issues reported. Catching on fire pretty much settles it!