Qihoo 360 (QIHU), a Chinese web browser, went public today and doubled. OpenTable (OPEN) trades at more than 90x projected 2011 earnings. Travelzoo (TZOO) trades at 56x projections. Priceline (PCLN) is now worth more than Marriott (MAR) and Southwest Airlines (LUV) combined. Paul La Monica has a tough time justifying those valuations.