When investors think of casinos, their minds go across the Pacific to the high-growth Asian market, where giants like Las Vegas Sands ( NYS: LVS ), Melco Crown ( NAS: MPEL ), and Wynn Resorts ( NAS: WYNN ) have built new empires. By contrast, Penn's focus on the U.S. market is a lot less flashy, especially during recent years in which both Las Vegas and more local markets have struggled. Even as the tide turns domestically, companies like Penn still don't draw as much attention.