Seems that it has gone the way of rambus.
Exactly, the money you safe on hardware you'll lose on support issues. If I were still a student I'd probably be running a hackintosh but my time now is too valuable to dick around with such a setup and afaik there are no firms offering support for hackintoshes.
But if you value the time to buy parts and assemble them more then a mac is good for you.
I think there's a market for a midrange, expandable mac. A quad-core machine with a few extra drive bays and two PCI x16 slots. A software developer's box. A Mac Mini is underpowered, but the Pro is way overpowered, esp with regards to I/O. The quad-core iMac is a step in the right direction, but it's not really expandable.
Apple has traditionally taken the position that there's not enough margin on this sort of market. But all those iOS developers have to run something. Couldn't Apple sell it at cost and write it off as developer evangelism for iOS?