To the OP:

I experienced a similar problem this morning. Blown freewheel on a wheelset with about 6500 miles on them. The shop guy says it's probably some springs that fell off and wanted to charge $100.

Even with regular changes on the Kool Stops, the rims are very worn from the super steep hills around here (always a stop sign at the bottom of each). Since he said the back wheel had about a month of life, and drags out the same Mavic Ksyrium Elite wheelset. No Deal. $$$

Edited: I said in another post that these were ES, I stand corrected these are Elites