Just got filtering working from within your friend feed. So now, you'll be able to filter your friends' activity by content type.  In testing, I have noticed that quite a bit of my feed content comes from the boards (your mileage may vary) -- so don't be alarmed to see that there aren't as many reviews/images/etc. when you start filtering. This should hopefully help you guys catch up w/ what's going on around the site in a quick and organized fashion. Enjoy :)