The IXOS XHE228 HDMI 2-Way Auto Switcher allows you to connect 2 HDMI sources to a single display.

http://digg.com/hardware/IXOS_HDMI_2_Way_Auto_Switcher/p.jpg

This is a cheap solution, if you have not so many HDMI connectors available at your TV.

IXOS HDMI 2-Way Auto Switcher (http://www.hdtvinfo.eu/news/hdtv-articles/ixos-hdmi-2-way-auto-switcher.html)