We know that blogger allows custom domain for blogspot blog where they actually store the data on google servers but the posts get published on our domain..this is done by creating a CNAME record with value as ghs.google.com How can i become blogger? that is my question.. If i have wordpress MU on my site which normally allows users to create blogs of the form username.mysite.com I want to allow them to use custom domains but host them with me without them having any ftp or any other access to the server..
Depends of where the Zone mysite.com is hosted. Just edit and add a "*" hostname record pointing at your webserver in your DNS configuration tool. Matt has a more detailed explanation: http://ma.tt/2003/10/wildcard-dns-and-sub-domains/