Actually, I'm camped out waiting for UPS to take the old beast back. They need to get that first - but things are moving along quickly. Should be here next week some time.
Er...the Mac Pro, that is, not UPS!!
No fans in that Macally case - it's very quiet and I keep it upright in the stand, so no worries at all about heat. It's got an additional wider bottomed stand it just sits in (which I use) or you can put the feet on it to make it less tippy. See the photos at the bottom of the page here:
http://macally.com/EN/Product/ArticleShow.asp?ArticleID=215You can lay them on their sides too - but I like to conserve space, so they're upright - lined up like a bunch of boxcars in a railroad siding. With the Airport sitting on top right now, since it lost its perch atop the G5 down beside the desk. (We also discovered this weekend that simply putting it on the desk, instead of on top of the G5, improved the wireless reception a whole lot for my son's iMac upstairs. Weird...it was a big 18" move at the most...)
These days, there are very few enclosures with fans - and they're usually the big ones designed for a RAID where multiple hard drives create lots of heat which is hard to dissipate without a fan.
If you must have a fan, there are these:
http://eshop.macsales.com/shop/ministack/I'm not sure how a fan on the bottom works, unless there are little feet or something that keep it off the surface its sitting on.
If you've got one of the single Mercury Elite drives from OWC, Jim, there are no fans in those either.