I can’t see the comments mentioned alongside the Blogger post

I know there is a web interface for this. I have a Bundle in my TextMate that can send to Blogger, although it's not working at the moment 'cause of some ruby problems.

I'll try to fish out the answer for you :)

Update

It seems that you can at least post with e-mail.
Here are the instructions for it.

Update 2

There is also the possibility of using Google's own API.

Here are the instructions on how to use the API, if you want to make a script etc for yourself :)

In the Blogger Dashboard, go to Layout > Blog Posts (edit), and there is an option for Show Share Buttons. Turn this on, and the buttons should show.

If they don't, then it's likely that your Post Template is corrupted - the best description I've seen of fixing the problem is here: http://www.bloggersentral.com/2011/01/reset-corrupted-blog-posts-template.html

There is also another option, which gives you more comprehensive buttons that include counts of times that you post has been liked etc: it's written up here: http://blogger-hints-and-tips.blogspot.com/2010/03/putting-facebook-share-this-badge-on.html