Thanks for the rest of the suggestions. I made jam with 3kg and froze the other 8.

Didn't think about making cherry pies and freezing them (didn't know they were freezable) but will try it at the weekend if we're still picking the darn things.

Biker-babe - would gladly send you some but don't think the post office would be too happy. My Dad already warned me not to send any (they get several packages of walnuts every year as we have too many of them to eat/bake too).