according SB's spacing chart, there's slightly less difference between the 2 brands in 10sp than 9 speed.
http://www.sheldonbrown.com/cribsheet-spacing.html
by my crude calculations, the overall width of a
Shimano 9 speed cassette (center of each outer cog), is 34.72mm,
and the Campag 9 sp is 36.4mm. It may work, but that bothers me.
There are plenty of other wheels out there with Shimano hubs, so.....
thanks for the replies,