If you use Facebook to promote your teleseminars and other e-events, I highly recommend using this prototype application called Enhanced Events Emails.

“Enhanced Event Emails will attach an iCal file to your Facebook Event Invitation emails. This allows for seamless integration with any external calendar product you may already use. With one click from your email client, you can add a new Facebook Event directly to your personal calendar in Google Calendar, Microsoft Outlook, and many other calendar products.”