Twitter' with @aalsum. The beauty of the twitter is the diversity of the sources based on the diversity of who you are following. You can categorize them later using the Lists, so you can focus on specific topic instead of running through the timeline. Until now, I'm not familiar with the communication style of Twitter (mentions or replies) but I think the comments style in facebook is much easier.
I would like to share with you my favorite list about the web archiving "Archivist". It is a combination of some of the active accounts related to the Web Archiving.