Apple just updated its Vintage and Obsolete Product List. I don't know about the rest of you, but I still have several of those machines in service, chugging along happily.
I figure, as long as a computer does what I need it to do it's far from obsolete. I know that as a computer manufacturer, Apple has to have a different definition of "obsolete", but I still hate to see some of those machines referred to in that way. It's just a little... I dunno... demeaning?