If she is experienced and your not, then you have no problem, she will gladly show you everything you need. If your both kind of new to the whole thing then I would suggest looking thru the older threads. This comes up a lot already.
as great as communication is there is a lot to be said for doing research. She may not be able to articulate exactly what she wants, and their are bound to be things that neither of you know about or would have thought of out here on the net. Your definitely pointed in the right direction.
One good resource is
http://www.sexuality.org/
For everyone who says that good communication is all you need, I present the case of me and my first girlfriend. Neither of us knew what we were doing, and despite decent communication she gave really lousy head. I had no idea how one went about giving good head, so even though I could say "feels good/ feels bad" it wasn't that much of a help. About two hours online reading some tips and tricks solved the whole problem.
three morels to the story: 1) Internet research is good 2) communication is necessary, but not sufficient. 3) you may find it to be a good idea to learn the theory of how to give a good blow-job even if you don't plan on giving any.