Help!

Some time ago, I actually purchased a domain name to move this blog site to wordpress.org. To make a long story short, I’m still working on it. In the meantime, I want to add a PayPal donate option to the site at wordpress.com. I have a link up to donate now on my “About” page (Go there and donate! Now!), but the button does not appear.

Could someone with a little WordPress savvy give me a hand here? I’d to not only get the button to show up, but also to be able to add it to all of my other pages. I’ve tried following some tutorials, but I’m not having much luck. Thanks!