All the reasons Jay named apply.

On Facebook I friend coworkers, colleagues, and friends. I most of the mafia-wars-style app posts as soon as I get the first story, but Facebook is a more personal venue. I have a few friends who post web design/web development related links, but if I depended on that for news I’d hear very little.

On Twitter I follow a lot of strangers whose sites I like, however, and there is significant overlap between the people I follow on Twitter and my favorite of the feeds I subscribe to through Google Reader. Most of those people tweet about their new blog entries, so my Twitter account often contains quality links about web design.

However, I don’t want to follow everyone on Twitter whose feed I am interested in keeping track of. And Twitter just doesn’t work well for presenting me with a selection of material to choose from. Not to mention that the people I follow also tweet about a variety of tangential and personal topics. I’m glad they do, I’d probably feel spammed if it were all business all the time. But it does mean I miss a lot of tweets.

On the other hand, it’s certainly the true that I can’t keep up with my Google Reader account; there are just too darn many articles. But Google Reader’s functionality works for me there — I can star things, tag them, and search for them later. I also like it for sharing articles and making notes to myself about them…

Ultimately I’ve found I need a combination of aggregator and bookmarking service to really keep track of resources and reading. I haven’t really found anything one solution that works for everything…