I added a link at the lower left of every post that reads "Message URL". Right-click the mouse on it and select "Copy shortcut". That puts it on the clipboard, and from there you can paste it into the HTML link tag in the message form text box.

<a href="[paste URL here]">Link text</a>

There's more information in the User's Guide (button to the left) about how to use these HTML tags in posts.

And oh yeah, a belated welcome to the Zone, Pete. Though I guess I gave you the traditional Zone welcome the first time we argued, didn't I? Knowing your mother's skill at debate, I'm not about to cut you any slack. She sets the highest standard.