Downloaded Lion dmg (ahem, free) last night, restored to install partition and and successfully upgraded my cloned SL. Will keep my original Snow Leopard partition until I'm happy Lion will do all I need. Seems to be fine so far, all my apps work with it, I think. Not yet installed iCloud... It's not for me, it's for the missus and the boy who both have iPhones. Our mac mini only has Core2Duo 1.83Ghz and max 3gb ram, it won't run ML (according to Apple). Thanks for all your advice. I think it's worth upgrading to Lion; it was a prompt to upgrade my ram and put in a new 500GB hard drive as the original 80gb was nearly full. Also I will be able to run more up-to-date versions of Safari, Firefox etc and some other apps .