Aaron, I use Redirection, too. Can you explain how do we add the regex code?

Go to the Redirection control Panel.
Scroll to the bottom where it says “Add Redirection”:
Add you regEX as the source url eg: (.*php\?(page|j|o|r|file|sub|.*?)=(http|ftp).*)
Add the file you want to redirect to in the “Target URL”
Select the checkbox that says “Regex”
Click add Regex.

You can also use REGEX when deleting post categories:

Source URL: “/my/original/category/(.*)”
Target URL: “/some/othercategory/$1”