Woohoo! I worked some Apache mojo today to "alias" the file-name of this home page (index2.html) to » index.rad.
That's so cool! Thanks to Nigel (Ghost Developer from New Zealand) for holding my hand. Here's the code I used to work this magic (added to .htaccess file):

RewriteEngine on
RewriteRule ^index.rad index2.html
Thus far, this technique has only been applied to the home page (starting with a baby-step). But in the future, I'd like to expand its use .. to 'radify' other key pages.
••• today's entry continues below •••
This application of the rewrite mod is purely cosmetic, but with considerable 'cool' factor (Radness). I am stoked! Sometimes these little things get me excited. Feel like a kid in a candy store.
Update: Boy, it would be easy to get carried away with this. Check out what I did with the splash page » splash.rad
Now all I need to do now is change the links on thousands of pages that currently point to the homepage (as index2.html) .. to » index.rad
For more along these lines, here's a Google search for the query » apache mod_rewrite web page extension htaccess