.dot would be funny, imagine telling people to go to dot.dot or even slashdot.dot
It would be fitting, considering slashdot was named such as a pun from the days when you needed to type http://slashdot.com. When you told someone out loud how to get to the site, it came across as http colon slash slash slash dot dot com. They could renew the joke with http colon slash slash slash dot dot dot.
I used to work for a company whose domain name resembled: somethingcomm.com
Giving your email address over the phone took an hour.