I am a huge Netvibes user. I find it's one of the best start page/RSS reader aggregator services out there. Before Netvibes, I used My Yahoo! but somehow Netvibes's GUI seems a bit easier to use.
I just discovered that you can publish a feed of everything you do on Netvibes. I've been looking for this function in other services but am ecstatic that it's here. So now, I plan on sending every article I read to my Netvibes activity feed. If you're curious what I read across my RSS feeds, subscribe to it! I'm also putting this link in my right hand column of this site.