I'm currently applying the following to my bylines:

Published: %date('F jS, Y #a#t g:i A')%

It works great for the published date & time, but is there a way to also output a page's revised or last updated date?

if you want the update date, you have to add some code. Here is a reference for teh info you will need http://codex.wordpress.org/Function_Reference/get_post

Thanks

That url sparked an idea, which ultimately lead my search to this one: Template Tags/the modified date

I ended up with this code that suits my needs:

<p>Revised: <?php the_modified_date('F j, Y'); ?> @ <?php the_modified_date('g:i A'); ?></p>

I wish my memory was better...sigh... you could also just use the option

%date-modified('F jS, Y')% - Same as above but displays the post's last modfied date instead of its creation date.