Thanks, Ben. I went to the W3C web site and got some good
information. Sounds like it's prefered to use the xs, sm, m, l, xl
font sizes since users can automatically adjust these by selecting
their "preferred" font size (from IE, select the size from the Page
menu). Fonts styled in pts do not resize when the user changes his
or her settings.
I'm still not convinced I have the right answer though. There
are just so many variables to consider (monitor size, resolution,
browser type, browser settings) relative to good old WYSIWYG
print...