Good to see so many entries in the Gobbler Raffle below! :-)
OK, so I snapped a few pictures of the help windows yesterday while I was in the Test Realm's Pet Pavillion. If you haven't been able to log in there (or just aren't subscribing right now), these might help you with understanding how things "work" in the new expansion.
There's going to be a loooooot of clicky clicky going on over there.
1- Hatchery Window (click on all these to make them bigger)
There are actually two dialogue boxes for this one feature in the game. Once you enter the hatchery with another person, you'll see a split screen where you'll have a chance to confirm that you want to go through with this expensive egg creation exercise. A lot of people seem to think that getting the message "your partner left" is a bug. It isn't (but it could probably be executed better or more explanatory). What it's telling you is that one of you doesn't meet the requirements to be there. You should go in with enough cash and an old enough pet, or you'll get kicked out.
2- mini-game window:
All mini-game windows operate pretty much in the same way. You'll want to click on the different worlds of the spiral to see which one will give your pet the correct stat gain. Always remember to go into these mini-games with a snack to feed your pet when you're done. It'll help boost your pet faster.
3- pet derby window:
This is another double window explanation. So for practice races, you'll get a handy join window, but for the real races, you won't get a window. It just matches you up automatically with other racers. Pressing on the up arrow and using the spacebar to duck and jump will be your new found fun in this patch. Also remember to click those four buttons that hold all your pets special derby abilities. Timing is everything on all the above mentioned clicky clicky fun. :-)
4- Snacks window:
Snacks work much like reagents do. In fact, you will actually get an opportunity to craft snacks (cooking yay!) in this update. Some snacks will be super yummy for your pet, some they'll tolerate, and from what I understand, so snacks are YUCKY for your pet. Pay attention to the wizard class type on the pet. :-)
Hope that helps with understanding some of the Window's you're going to see in the new expansion!