The store hack tie-in to the activity hack is simple. The activity hack only controls the generation of funds. The issue there is simply finding a store hack that is capable of doing advanced things without being a mess. Besides the issue of people exploiting to get things for free, there's the issue of, for example modifying other peoples' user titles. If I modify someone's title for a month, then they go and modify it for a day, the proper thing to happen after a day would be for it to go back to mine, but there's a lot of code involved in tracking stuff like that.

As far as the blog stuff, I know there is at least one 3rd party modification and there is an official Jellsoft blog product for vB. I don't think either of them allow the extent of customization as LiveJournal or MySpace, however. I told Grav that I'm against this, but my time is not needed for this. Especially if we go for the Jellsoft version, it should be an incredibly simple installation (requires the forum upgrade I'm working on on the test board, however).

The vBSEO stuff may not be as much trouble as I initially suspected, but I haven't really looked into it.

I still think guest posting is a huge mistake, as it will prevent most people from ever making accounts. A quick registration may be as simple as a form hack, but it may be complicated by the verification image.