OK, here's what you do: if you have an account with a name that you want transferred to a different account, make the account with the cool name a member and change its name. Then wait the 28 days and on the day that you can change the account with the cool name's display name, make the account you want to transfer the cool name to a member. Open up two tabs; 1 for changing the account with the cool name's name and one for taking the cool name on the one you want to have the cool name. Change the account with the cool name's name again and as soon as you do, it will become available for you to take on the account you want to have the cool name.
Here's a bit simpler version
1. Change rare accounts name
2. wait 28 days
3. make the account you want to transfer the name to a member.
4. change the rare account's name again
5. take the rare name on the account you want it to be on.
This is much less riskier than the '2-day' method. However, it takes a lot longer. Definitely worth it if you have a rare name you want to transfer to your main. Good luck.