I got one of these AP 7" for my daughter and noticed the missing Market. I added the Amazon App Market and made my daughter swear not to order paid apps without checking with me first. Since my nine year old does not have a credit card I had to use mine. My daughter was disapointed because the Amazon App Market does not have all the apps of the Android Market.
While pondering this I did a little looking and found that you can open a browser and go to market.android.com, sign in with an account and it is the same as having the Android Market installed. I set up a shortcut on my daughters home screen and other than "it looks different" she has loved it and found all her apps.
I read through the entire topic and noticed that no one posted this so I thought I would share with the group.