Self-hosted blog Admin Panel Forwarding to WP.com

This is sort of two questions in one, but to solve your first problem and get your blog working again you need to edit your MySQL database. If you have access to PhpMyAdmin open that up and find the wp_options table. Inside the table there are two values to change siteurl and home are the names I believe. Change these both to http://example.com/blog or whatever the appropriate link is and this hould get things working again.

The second question, if I am understanding correctly, is how do you cross post from a self-hosted WP install to a WP.com install simultaneously?