Friendfeed is a very cool site which aggregates all your rss feeds onto one page. This is cool because I contribute to 6 blogs and numerous other sites (Ma.gnolia, Flickr, YouTube, Twitter, etc.) often automatically without ever visiting the sites in question! Now I have one place to go to see everything I have published.
Better yet, others can see this page and better again, I can see all my friends updates to their sites on a single page (and leave comments on them!).
This is all very useful but suffers from the same problem that the Twitter page suffers from. You need to constantly refresh to see the latest updates.
To get over this there are several Twitter client applications for the desktop (and for mobiles, Blackberry’s, iPhones/iPods, etc.). The one I use is called Twhirl and it is very cool because as well as auto-refreshing, it gives audio and visual notification of replies and direct messages.
Even better, through the Twhirl Friendfeed interface you can also comment on and favourite others posts.
I love it. Now I’ll have to watch who I add to my Friendfeed friends list very carefully as this could overwhelm me very quickly!