Wait a minute... Patty's right (which means I was too, initially
). Though I remember "January 2007" being mentioned several times in conjunction with domain name changes, according to David's FAQ page, domain names can be changed (the exact fee being $10, not $15) and there is no mention of having to wait to do so...
I think the January date must simply have been mentioned in conjunction with the 6-month waiting period to make any changes to existing account, as Patty said.
Promotion FAQs