I just passed through there so here's the lowdown. If traveling through the international terminal, your gate will most likly be in the E terminal. They have only one lounge that *G can acess, the Air China lounge. It's decent and much better than other Air China lounges. They have no showers, but they do have plenty of computers, plenty of comfy leather chairs, and private rooms to sleep in upon request.
In the terminal it self, aside from the stunning terminal, there is the usual duty free, three overpriced cafes and a pizza hut, which frankly is your best bet when it comes to food. The lounge does have snacks and hot food at certain times.

Oh and yeah, you have to go through customs when changing at PEK. Make sure you have a visa if you hold a US passport or you will not be allowed into the country and it could get messy.

Have a great honeymoon!