"My New Posts"
I post over on e-cigarette-forum.com. They also use vbulletin, but instead of having just a "What's New" type link, they also have a "My New Posts" link which only lists threads with new replies that the logged in user has also posted in. This is very useful on a highly trafficked forum. I often miss replies to my posts on less busy threads here at LGK.
I don't know much about vbulletin, but I'm assuming this is some sort of plugin. Any chance we could see something like this on LGK?