Well, so much for using iCloud to sync my iPhone and MacBook. Apparently it requires Mac OS X 10.7.2 or higher, and I'm still using Mac OS X 10.6 (Snow Leopard).
So none of those fancy iPhone to Mac features will work for me.
I suppose I could update to the latest version of Mac OS X, but right now, I'd rather not. I'm waiting to upgrade my MacBook to a newer version some time later. But not quite right now. Right now I'd rather just wait.