The one created by Ryan Fairfax is great, as it also includes the news articles. Anyone know if he is working on an update (i.e. bookmarking)?
@gamingmichael: I have a "2.0" update that I've been working on - but it's mostly updates to switch to the Windows 8.1 / Universal SDK so that when the Xbox SDK drops I'll be ready to get things working.
If you have a specific feature request let me know - I'm not 100% sure what you mean by bookmarking and since I'm actively working on things it's a good time to get feature requests in.