My suggestion is rewording those sentences to read "If you are waiting for a specific deleted username to become available, you can register to receive a notification when the username is available for you to rename to by viewing the deleted user's profile page. You can view their profile page at http://exampleusername.livejournal.com/profile. (Replace exampleusername with the user name you want.)"
Alternately, something could be added to FAQ 25, like what I suggested above.