Since the new iPhone is out we are seeing 4 and 4S on craigslist for decent prices. We were thinking about getting the kids iPod Touch's for Christmas, but maybe just get them the phone with more storage for less and let them use them wifi only. But is it possible to iMessage without a phone number attached to the account. Set up is different from first look compared to how my wife's iPad is compared to my iPhone. Thanks for any advice.