I think that I’ve mentioned it before… but Improving Enterprises (where I work) has a single RSS feed mash up with ALL of the people at Improving that blog. You can subscribe to the feed here, or sign up for email notifications. While you’re at it, check out the cool widget from Feedburner (shown above).
Allen Hurst used Yahoo pipes to put this mash up together and then we ran the whole thing through Feedburner to give us the email and widget features. Awesome!