This thread is four months old so I presume you have moved on, but I also think having the author box show on pages is a good idea. In my case, I actually want to place the author box in my footer. The good news is it is easy to do this. Find the following line in the file sabox_author_box.php:
if ( is_single() or is_author() or is_archive() ) {
and replace it with:
if ( is_single() or is_page() or is_author() or is_archive() ) {
The bad news is that if you do this and the developer releases an updated version that changes that file you will lose your modification. If the developer is reading this, I encourage you to add pages as an option in any upcoming version.
