Continental is running a number of very nice long weekend specials for international travel (bookable through Friday for Saturday through Monday/Tuesday travel).
IAH to Guayaquil, Ecuador (GYE) comes in at $359 (best regular CO fare on FareCompare.com is $618)
IAH to Panama City, Panama (PTY) comes in at $259 (best regular CO fare on FareCompare.com is $513).
IAH to Puerto Vallarta, Mexico (PVR) comes in at $149 (best regular CO fare on FareCompare.com is $290).
IAH to San Jose,