In article <1127415160.033362.221300@g47g2000cwa.googlegroups .com>,
"nb8nc6" <nb8nc6@gmail.com> wrote:

> Excellent suggestions, Tim. Thank you. I like labeling the link idea.
> It is a nice clean solution. I am against the whole warning popup
> idea.

Slashdot does something handy that is similar by showing the target
domain in brackets. Additionally, you could use CSS to change the
color/style of the links that are external.