Bob,
2nd question first. At the top of each forum, there's a "Post Tools" or "Forum Tools" link. If you hover over that, there are options for "Subscribe" or "Subscribe to this forum". I honestly wouldn't recommend subscribing to the whole Joomla 1.5 forum, unless you're really curious, but feel free

You're always welcome to pitch in or learn more.
As for your question, there are 2 separate ways to have your website shown within Facebook: Canvas and Page Tab. They are different altogether. From what you read, it sounds like we need to update our Page Tab guide. In JFBConnect now, when you're in the Page Tab configuration area, there should be some text like:
To add it to your Facebook Page, Click Here.
That will only show if your Page Tab seems to be configured properly. In 4.1, this was changed due to some changes in Facebook, and our Guide still seems to reference the 'old' way. When you click that "Click Here" link, you should be redirected to Facebook, where it will ask which Facebook Page you want to add your application to. Once done, on the left hand column in your Page, you'll have a new item. When clicked, it will show the Facebook Page Tab URL that's configured in your Application (or the Reveal Page ID if that's configured in JFBConnect).
Hope that helps explain, but if my explanation has gone south, let me know
Alex