If you wait until 04 – 06/06/2010 world cup dh /4x FORT WILLIAM United Kingdom
"Underneath the yellow tents, on the day before and leading up to the start of the event, Mavic technical support will help any participant in any way that they are able to – within the limits of their means or obligations to the organisation. Our technicians will fix the problems of the participants, repair wheels plus offer help and technical advice. For this service, all labour is free of charge and any necessary parts and accessories will be charged at the recommended public price."
I had this on a set of crossmax. I used a good penetrating oil and a week or two of rotating the wheel and oiling a few spokes at a time and trying them with the spanner (decent metal one). This works well if you're not in a rush.