Here's a nice story from hubcanada.com describing how John Demco co-founder of webnames.ca is raving about the latest domain promotionof .tel domains:

Did you forget or lose the last phone number business card your acquaintance gave to you a few hours ago? Well, if that person had a .tel domain, chances are you wouldn’t be worrying.

Since we live in an age in which there are more ways to communicate than ever before, .tel is welcoming a new servicewhere people can stay in touch without having to worry about e-mails and phone numbers.

John Demco, “The Godfather of .ca” and co-founder and director of Webnames.ca is very excited about .tel.

“.Tel will be the most convenient and efficient way to reach your contacts and ensure your contacts can reach you — wherever and however you choose,” said Demco. “Instead of exchanging individual pieces of information such as your phone number, e-mail, cell number, work number and so on, you will simply give people your .tel.”

.Tel will provide individuals and companies with a single point of contact where they can safely store, update and share contact information. This will include e-mail addresses, phone numbers, social networks, gaming IDs, websites, blogs, Skype, and so on.
If you happen to get a new phone number or e-mail address, simply update your new information on your .tel domain. There is no need to notify any of your contacts, just as long as they have your .tel address name memorized.

If you have a simple or unique name, getting a .tel domain is the perfect opportunity to let people know how you can be reached in a simple way. No more cards, just your dot tel like yourfirstname.tel or yourcompletename.tel.