If you need evidence of the impact a quarterly earnings report can have on a company's stock price, look no further than HomeAway. HomeAway (AWAY) is the world's leading online marketplace of vacation rentals with sites representing about 720,000 paid vacation rental home listings in 168 countries. It operates websites under its own name as well as others -- including VacationRentals.com, VRBO.com and BedandBreakfast.com -- in the U.S., Europe,