But how do you transfer the address book once you have it on your iMac desktop to the MacBook Air. I have struggled with using file sharing using either bluetooth or my shared network but to no avail.
a free MobileMe Trial
Priced exactly what it's worth. Dropbox is another option.
Well, I disagree with you. I find it very useful, as do others. I realize that there are other free options, but I've made my choice and that's neither here nor there.
The "issue" with dropbox, bluetooth, flash drives and the like is that you still have to import the data once it's copied over. With MobileMe or another syncing solution, the data is automagically imported.
(Not really a big problem for some, may be for others).