Official Class Reference:

http://www.google.com/apis/maps/documentation/reference.html#GEventListener 

http://www.google.com/apis/maps/documentation/reference.html#GMap2 (scroll to "events")

http://www.google.com/apis/maps/documentation/reference.html#GMarker (scroll to "events")

...plus other small "events" sections in reference

Examples: (Please populate)

http://koti.mbnet.fi/ojalesa/exam/events_v2x.html

Creating your own custom events

http://econym.googlepages.com/events.htm 

Markers Events:

Map Events:

Other: