WordPress.com is a new hosted version of the popular open-source software WordPress. WordPress.com builds upon the WordPress 1.6 codebase including new support for multiple users named WordPress MU to describe its multi-user capabilities.
Developer Donncha O’Caoimh has been busy adding new multi-user capabilities to WordPress. WordPress MU features improved user management, categories shared across an entire install, and a redesigned drag-and-drop editing interface.
Bloggers will soon be able to signup for their own hosted WordPress installation at WordPress.com but until then the service is invitation only while hardware comes online and everything is properly configured. If you would like to experiment with WordPress.com’s hosted WordPress solution just let me know and you might just receive an invite from the WordPress.com pimp.