Follows these quick steps to email a web link.

1) Select the site address in the Safari address bar.

2) Click "Safari" on the upper left corner of the menu bar, for the pull down menu.

3) Click on "Services" in the pull down menu, click "Mail" in the sub menu, click "Send Selection",

Leopard automatically starts your mail application.
Just add the recipient's email address, and subject for the email.