Since Horde and Alliance can't group till you learn a common language, I have a couple of questions:
1) How do you learn languages?
2) What is the "common" languages that people will learn to communicate with each other?
3) Even if you are of the same faction, your starting cities could be quite far apart. Is there a way by which you can quickly get to other similarly-aligned faction areas... such as, is there an easy/quick way for a Night Elf to get to the Human newb area?
4) Once you leave your race's newb area, are there newb quests that you can perform (for gear, exp, etc) in another race's newb area or are newb quests race-specific?