Officially announced for June in Japan, July elsewhere:
http://www.joystiq.com/2009/04/09/iwata-wii-sports-resort-out-in-japan-this-june-overseas-in-jul/
Unfortunately no additional information about what games will be in Sports Resort.
http://www.joystiq.com/2009/04/09/iwata-wii-sports-resort-out-in-japan-this-june-overseas-in-jul/
Unfortunately no additional information about what games will be in Sports Resort.