show topic summary and images thumbnail in list, like this
Not at the moment, should be OK for plugin.
Note that pinned topics behave this way because they are considered more “important” by the person who pinned them.
I like the idea too.
The users like topics and posts with images. You know, one of the reasons why Facebook became so famous is because the users post photos, a lot of photos.
You can do this only for the first post of a topic, If the topic poster has attached a picture that thumbnail should be seen from the forum frontpage too.