Carl Frappaolo and Dan Keldsen listed wikis, blogs, social networking, social voting/ranking, social bookmarking, RSS, mashups, and podcasting as 2.0 technologies in the first AIIM State of the Enterprise 2.0 Report in 2008 (while also arguing that you also need 1.0 and 1.5 technologies), - how would you classify the different technologies for Enterprise 2.0? I guess wikis (e.g. Mediawiki and PBWorks) and blogging platforms (e.g. Typepad and Wordpress) may be two categories, - what do think are the other categories?