First question: I use the Twenty Ten template and visitors to the posts page
can already add their comments without logging in etc. This may be very naive of me, but what would be the advantage of adding a facebook button.
Second question.In scouring the webifor how to do this, the more understandable solution (for a novece like myself) seems to acquire a code from facebook (I skip details. Upon doing this I fiund this explanation
Now that you have the code, visit your blogger dashboard and select the Design option and in it the Edit HTML option. Select the Expand Widget Templates option and search data:post.body in the template and paste the Like button code above it.
For the life of me where is the "Design Option" let alone the "Edit HTML option" or the even more hidden "Expand Widget Templates"?