Windows Live Messenger has a nice (super easy) feature that can be used to easily add a "Live Chat" feature to your clients websites through Sitefinity.
I wrote a short post at Alighten on
adding the Windows LIve Messenger to a CMS system.
And you can see it in action at
Alighten's live chat page.
The only downside is the
iframe needs to be in a usercontrol and can't be dropped directly in the generic content.
Sincerely,
Ben