Its all pretty much the same thing, dont worry so much about the diagram, just build out lots of 2.0s with highly unique (can be spun crap, just all different spun crap) content, preferably with multiple pages per web2.0, interlink some of them. No point trying to get a link 'wheel' or 'pyramid', as some will probably get deleted.
The pyramid idea though - eg backlinking your backlinks is still solid, just easier to do the higher layers with easier to automate things, like SB, xrummer, bookmarks and social spam.