I just added a nifty piece of code to each of my blog posts. It makes it easy for readers to send blog posts to their friends.
Here's what it looks like in Typepad or Moveable type:
| <a href="mailto:?subject=Check out this blog post from Charlie&body=<$MTEntryPermalink$>">E-mail this post to a friend</a>
I found the "mailto" commands here.