Kayak Software (KYAK) priced above its expected range at $26 a share early Friday and popped 25% in its first hour of trading, solidifying a rebound for the IPO market. Kayak's website, created by veterans of online travel agencies Expedia (EXPE), Travelocity and Orbitz (OWW), searches other online travel agencies, along with hotel and airline websites, to help customers get the best deal. Its innovative business model, profitability and strong