As we detailed in our previous installment, More details on moving to a Google account, if you used the MyBrand service at feedburner.com — our service that allows you to use a custom domain with your feed — you must move to a Google account and update your DNS CNAME records by March 16, 2009, or else your MyBrand URLs will return a 404 "page not found" error.It's important to note that it is not enough to just sign in with a Google account and request to move your account if you use MyBrand. Even if your MyBrand-ed URLs have continued to work after you have completed your move, they will cease to work on March 16, 2009 if you have not changed your DNS CNAME.If you plan to continue to use MyBrand, you can find detailed instructions for changing your CNAME when you are signed into...

Read more at the source of this article