We're thrown out the old rating system in favour of a more complex rating system which shows how active you are in the forums.

Here is the description:
Level: a user's level is based on how many posts the user has made.
This should be able to scale up indefinitly.
HP: represents how active the user is. max hp is based off level, current hp is based on how often the user posts.
MP: represents how quickly the user posts. Max mp is based on level, each post costs mp, and mp regenerates over time.
Exp: a percentage showing how many more posts the user has to maketo get to the next level.