Leaning away from the direction this thread has gone, I just want to say that I use mount points on some of the clusters I have running at a client.
...However, I really wish that for at least the Server based operating systems Microsoft would stop using letters to assign disks and use numbers, a little like how the disks are registered within cluster storage.
Then the basis for mount points would be moot.
I will also mention that it annoys me that A and B are reserved drive letters for a hardware platform that is virtually non existent and at least give us the option to use those letters. (Any one got around this one?)