Note that if you add this gadget to a tab, it eclipses all of the other gadgets on the page, so you probably want to create a new tab for Your Page Here before installing it. Once you have it on your page, the settings are pretty simple:
All you have to do is enter a URL and you're ready to go. Come on! Try it for yourself:
And if Calendar isn't your thing, then I recommend trying out Google Reader (http://reader.google.com/) with Your Page Here.
Thanks to Chris McAndrew for suggesting this hack to iGoogle.