All my blog post URLs currently look like this: http://www.HeyItsMyBlog.com/?p=368
I want to change the URLs so instead they look like http://www.HeyItsMyBlog.com/2010/11/new-kittens-omg/
This is an easy change in the WordPress admin panel, but there are a bunch of people who have linked to my currently-formatted URLs around the web. How can I make the transition and ensure that it won't break the old links?
It works either way (when you set the permalink to your desired one). Test it of course. And oh, this question belongs to http://wordpress.stackexchange.com
The latest version of Wordpress automagically interprets URLs of the form
?p=777
by redirecting the user to the corresponding pretty URL. You don't need to do anything special beyond enabling pretty URLs in the admin panel.