Thank you much, Steve.
I will proceed accordingly.
Regarding my post above: it turns out to not matter. When one actually clicks on a site to share with (such as Digg), the right url is sent (that is, the url that contains the post name).
I have been using the <? php akst_share_link(); ?> code in my index.php and single.php files, and until this morning thought there was no problem with these.
However, I ran some link checking software for my site and all of the “share this” code came back with a flag. In looking at it, it appears that the share this code is using the default numeric permalink addres generated by WordPress, whereas I use a date and name-based permalink structure. Hence, it appears that all of my share this links are going to be to invalid permalinks (to numbers rather than date and time based).
Suggestions? I really do not want to go back to the default permalink structure.