Hipster-L wrote about save.ca, a website that tracks coupons you can print and use at your local store. I thought it was a fascinating idea, but lazy guy that I am, I thought it was too much work to visit the website periodically.
I looked for a way to be notified when a new coupon was issued, but I couldn’t find one. The irony (q.v. “lazy” above) then, is that I decided the obvious approach was to fiddle with some software to create an Atom feed out of it! I haven’t tested it much, but it seems to work well enough.