Update: Hide My WP 1.7 was released
Hide My WP protects you from recent massive brute-force attacks on WordPress installations. This massive hacker attack could aim at the biggest, most aggressive botnet ever seen.
With Hide My WP 1.7 nobody can know you use WordPress! This not only greatly increases your security against hackers, bad written plugins, robots, spammers, etc. but it also allows you to have more beautiful URLs and better control over your WordPress.