There has been extensive discussion on other forums about the Z clutch issue. You are not the only one who has had the problem. I think 10.5k is the most premature I've heard about though. Some people have been running factory clutch for 80k+ miles with no roblems, driving the hell out of it, and some people have been easy on it, and had to replace at 20k. IMO, I think it is a manufacture defect, but there really is nothing that can be done about it, since the clutch is a normal "wear and tear" part. I plan on going JWT clutch and flywheel soon as I get the money. When you have yours replaced, don't go OEM, go ahead and upgrade.
:SOLD:Pewter Altima 02 3.5SE 5MT Sport/Leather Loaded
To buy myself a 06 350Z Enthusiast :)
:SOLD: 1997 Ext Cab XE Pick-up 2-19-06
:SOLD: 1986 KC 4x4 Pick-up 2-15-06
To buy the wife a Saturn... :(