I have made a script where you can follow HN users on http://www.nou.nl/hn/. Once you follow users, you can see those users on the frontpage with their last submission or comment. You can also click on the username to see the last 10 submissions and last 10 comments.
I have made it for myself, but am wondering if other HN users would like to use this. If so, I can rewrite the script somewhat, because now I am using cookies and calling the HN Search API (received help from Andres Morey; thanks!) for each user you follow. I would then also add some features, like recommendations who to follow, how many followers a user has and how many a user is following, extended profile page and more.
Remember: this is a test version, so don't enter too many HN users or actually start using it, because it is not production ready (for example, 10 followed users will take more than 4 seconds to load the homepage).
Hope to hear your comments!