If you subscribe to your ravelry comment feed, you will know when people put comments on your projects! You can also subscribe to your favorite peoples' project feeds so you can see when they add a new project to Ravelry. yay!
Stalk your favorites, you know you want to. :)
To find both of these feeds, go to the feed icon in your project notebook and then paste it in your favorite blog reading software! (bloglines, etc)
You can also subscribe to the feed for all your friends' projects: