Is there a mod to "star", "favourite" or "bookmark" posts?

[Michlerish]

I want to be able to "star" posts, which would be archived under your user profile for later reading. Similar to gmail's stars, or twitter's favorites.

For example, you find a really useful post and you want to save it for later so you can easily find it. You would be able to star it, then somewhere in your user profile, you can view all starred posts.

Is there a mod for this? Or even one with similar functionality?

Thanks!