It's not a feature of the standard Nabble blog though, perhaps, it would be possible to create by editing the NAML code.
You might try the "News" application type and see if that suits you better. It has a summary of all the blog entries on the front page but when you go to "read more..." it then shows the posts and comments as you might want.
Volunteer Helper - but recommending that users move off the platform!
Once the admin for GregHelp now deleted.