I'm after some spare wheels for my cross bike, preferably with Shimano 8 speed compatability, and still round Tyres a bonus.

I have some nice mavic 700c rims lying around with nothing to do. would they be of some use?

Sounds promising, which Mavics and how many spokes?

Mavic open pro maxtal s.6000
622 x 15 36 hole.

They're slightly weathered but hardly used. They were taken apard by unwinding the spokes a little at a time too, so should be straight.

Shame that they are 36 holers, I've only got 32h hubs.

Could always buy some new hubs, what sort of money are we talking?