I hit 100 hubscore with this hub: What is more important hubber score or traffic? http://hillymillydee.hubpages.com/hub/Which-Is-Mor...
As it was said there's nothing significant to happen if you hit that score for it will go up and down. Actually when my hubscores went down, my hubber score went down too. But I feel happy because the work of my hand is helping new hubbers because they can easily find my hub in the front page.
Our hubscore has nothing to do with our ranking in Googles but the comments, the movement, the traffic and positive feed back has a big impact on how we will rank in Googles. It also shows that our hub is useful.
I was just expecting that my audience for this topic would just be hubbers but it turned out that I have lots of traffic from search engines.
So though it is not something special to hit 100 hubscore, but there are benefits we can get in achieving it. Actually from one of my hubs that reach a high hubscore, someone from the SERP had signed up in my affiliate link.
But my experience maybe true or maybe not to another hubber. Just sharing.