If you create a new account, it will allow you to select an @outlook.com email address. There is no ajax on the account name, you'll have to enter the captcha to know if your chosen email address is available.
- Click your username in the upper right, click sign out
- click the 'sign in' button on the next page
- click the white 'sign up' button on the bottom left
- see @outlook.com text box four entries down
Yea, re-typing that captcha about 9 times was the most annoying part. (I only tried 3 different addresses, but it didn't like what I typed in the captcha the other 6 times.)
You can sign up for a new one on the outlook.com site but I have no idea how to migrate an existing hotmail.com address to outlook.com.
I can't even get to the new outlook.com with my hotmail.com address; it was only after creating a brand new outlook.com address that I was able to see what all the fuss was about
You should simply be able to do it by: logging in into your hotmail account and going to http://outlook.com while still logged in. After that, go into mail "More mail settings" (click on the upper-right gear) and choose "Create a Outlook alias" if you want to add e-mail aliases @outlook.com
But now that you already signed up for a new account it may not work straight away...