Highlight what people aren't reading and bubble to the top

[TomSteinberg]

And reward people for doing so somehow

[mhl]

After talking to @TomSteinberg, the idea here is to have a widget on the front page called something like "Discover Something New" which highlights speeches, etc. that very few people have read, as a way of encouraging people to pick up on odd or unnoticed things that are happening in parliament.

[struan]

Related to #252