I expect iCloud support to come to Snow Leopard eventually but it might not be free.
BTW, why do you prefer the 2010 Mini? I have older Minis and I pried them open, upgraded to 2 GB of RAM and SSD and upgraded them to Lion. They run fine. I'm upgrading our MobileMe family pack to iCloud one sub-account at a time. Soon enough, no member of my family will have to so much as think about syncing or backing up their iPhones. But when I read your post, I'm puzzled about how a 2010 Mini might be preferred over a 2011 Mini.