Well you have to go to go to settings in Blogger and turn on Archiving. Then in your template you need to place a this code which will make your perma-links time stamps. This is the code used here at 53:

< a href="http://53.blogspot.com/?/< $BlogItemArchiveFileName$ >#< $BlogItemNumber$ >" title="Permanent Link" > < $BlogItemDateTime$ >< /font >< /a >

If you want you can put anything as the perma link, on Jaded they are the turtles at the end of my posts. More info is here.