It's been blogged elsewhere (e.g. on Heather Morrison's Imaginary Journal of Poetic Economics: http://poeticeconomics.blogspot.com/2008/06/three-forthcoming-oa-policies-announced.html) but I should make brief mention of the just-announced Ontario Institute of Cancer Research (OICR) Open Access Policy. I won't get into too many details (this page - http://www.oicr.on.ca/portalnews/vol2_issue3/access.htm - covers the basics plus there will be lots of discussion elsewhere) but I will say that the new directive is much in the vein of the previously-announced CIHR policy.
Also, in her posting, Heather says "Note: watch for OA policies at other Canadian provincial funding agencies - discussions are underway!" I know that the main Alberta health funder, the Alberta Heritage Foundation for Medical Research (AHFMR, http://www.ahfmr.ab.ca/), is certainly looking seriously looking at Open Access options; along with Denise Koufogiannakis from the University of Alberta, I talked with some folks at the AMFHR several months back about OA.