The First one is HOME by Yann Athus-Bertrand (known for his book La terre vue du ciel). It's a must. I'm sure you have heard Dave talk about it. You can watch it on the web. Here's the link to the website www.home-2009.com
The second is WATERLIFE- a documentary about the Great Lakes. I have not seen this documentary but it seems to be another MUST. I've only heard good rants! Here's the website: www.waterlife.nfb.ca