Hmm yes I haven't thought about that.. But the wheels come without a cassette and I have an 8 speed group, including cassette, laying around. So going that route will be cheaper than having to buy a 9 spd cassette and respacing it.. But I'll give it a thought.
Are all the sprockets on a Campagnolo 9 spd cassette individual loose sprockets? I haven't tried taking a Campagnolo cassette apart yet, but the Shimano ones I own have only the smallest 3 or 4 sprockets loose, the bigger ones are all on one unit.