I'll take a crack at it.
Where are you looking to place the tipper?
@StuartH weird, it should look like this: http://i.imgur.com/41sOsUs.png
Anybody thought about a WebRTC integration. To start calling and chatting with other users.
To give you an impression look at https://twelephone.com/
We have a game topic where users have to find from which movie the image is coming from.
We are keeping points at each winning, but maybe a plugin could do that, with a topic header reminder, and a list of users to attribute the point.
Just an idear
Just another idea I came up with for a plugin...
In the topic view, if post count is greater than a preset number.. hides all trivial posts ex. "thanks!", and/or displays posts with high amounts of favourites only
Maybe a more simple version to start with just collapses trivial posts. This could be done entirely client-side, so a easy plugin to make I think!