A great news report from CanonRumors.com.

Apparently Canon will be running some rebates for its dealers from September 1, 2009 to October 31, 2009 on a wide number of Canon prime/zoom/macro/IS/EF/USM/EF-S lens.

Check the post here for a complete list of rebates from Canon:

http://www.canonrumors.com/2009/08/canon-lens-rebates-canada-2/