I modified tiki-edit_templates.php?template=templates/mail/user_validation_mail.tpl

I added:

Subscribe to Tiki@Freshmeat This improves our popularity ranking and helps us attract more users. You will be informed of new Tiki releases. http://freshmeat.net/subscribe/31717

Please create your User Page. Tell us about yourself!! http://tikiwiki.org/tiki-editpage.php?page=UserPage{$mail_user}