Helping with Furniture is a group of Ottawa volunteers who collect gently used furniture that is unwanted and deliver it to refugees living in the Ottawa area. They provide a pick up service every Wednesday night, funded entirely out of the pockets of the people running the program.
Those who have unwanted or unneeded items in their basements or garages should consider making some donations using the form on their website.
I found out about this via Green Living Ottawa.
[Update: 19 July 2009] Let me stress one thing: posting a comment on this post will not lead to your furniture being picked up. I have no affiliation with Helping with Furniture. If you want them to collect something from you, phone them directly at 613-745-1348.