Thanks for the reading list insight. But I'm surprised reading list isn't paired with any kind of note taking system. I have been dying for a sidebar solution

Thanks for the reading list insight. But I'm surprised reading list isn't paired with any kind of note taking system. I have been dying for a sidebar solution where I can take notes and write while I read a webpage. As it is, I always have Notational Velocity open on the right and Safari open on the left.