If you have a WordPress.com blog and wanted to create another blog, you were required to create a separate WordPress login. Now you can create unlimited Worpdress.com blogs on a single login.
Matt at WordPress.com blog announced this feature.
“When you go to wordpress.com/signup as a logged in user, it lets you simply add another blog to your stable. As many as you want, need, or desire no limits. You may also notice that when you’re logged in the WordPress.com homepage gives you a link to the admin section of all blogs that you have access to.”
It is a welcome feature to regular bloggers on WordPress.com who run multiple blogs. If you have multiple accounts, go to Users > Authors & Users > Add User From Community to make one of them an admin on both blogs. Become your blogs professionally now!