US Airways baggage information at their official website:
http://www2.usairways.com/en-US/traveltools/baggage/baggagepolicies.html
US Airways does a better job than most other airlines in explaining the pricing and rules for baggage.
However, I can see how someone who hasn't flown in several years might not look for such a page before buying tickets.
As I noted earlier in this thread, it's possible to save some money by packing fewer checked bags -- as long as such combined loads aren't too large or heavy.
I haven't flown in 6 years or so, don't have cable (to hear about it on the news), and I know about the baggage fees. When you book it clearly states baggage fees are not included. And gives you a nifty chart that shows how much the fees are for your baggage.
If you plan on taking that much luggage, suck it up and pay the fees, just don't let it ruin your time.