One of my favorite features is the daily email update (which will hopefully scale) that makes sure I catch any topics I am interested in, in case I wasn't able

One of my favorite features is the daily email update (which will hopefully scale) that makes sure I catch any topics I am interested in, in case I wasn't able to keep up with my Twitter feed. I would still like to see the ability to add negative keywords to exclude Gowalla/4square type of posts.