I just bought a Day Runner planner. It came with undated weekly calendar pages (the kind that you fill in the dates...if you don't know what I'm talking about, click here ). I like the kind with the dates already printed on them, so I'm giving the undated ones away.
They fit the 3 3/4"x6 3/4" 6-ring planners, but they'd probably be helpful even if you just want to use them by themselves. I'll be willing to mail them to the first person who comments here with their e-mail address. Then I'll e-mail you to get your snail mail address :)