I've been running around with my clutch slipping for a few months now. That's more to do with me not having the time to fit another at the mo and not really bothered if it gives up completely (although it prob won't).
As euan says the exedy clutch is ok, also i've had a borg and beck in mine for over 4 years now, withstood crail, and knockhill, only started slipping due to me hitting 1.5bar boost a few times.
Johnny.
In saying that i'll prob go for the exedy next.