Show HN: I'm doing a gem-by-gem guide for social networks in Rails. Feedback?

Have you ever read Railspace? It might just need an update from someone like you. <a href="http://www.amazon.com/RailsSpace-Building-Networking-Addison-Wesley-Professional/dp/0321480791" rel="nofollow">http:&#x2F;&#x2F;www.amazon.com&#x2F;RailsSpace-Building-Networking-Addison...</a>