I’ve run a buddypress site for a few years at http://www.yeahhackney.com (back when groups had forums)
I’ve decided to move to a new model where users blog rather than post forum threads, so I am going to use the user/profile bits on buddypress and the blogging functionality of wordpress.
I have a lot of content on my existing site and I want to know:
1) is it possible to migrate any of it over: forum posts become blog posts and forum replies become blog comments while retaining the authors
2) can I archive my existing site, yet leave the content searchable in a sub directory?
if you have converted your group based forums to the new site wide forums i believe you can by using a post type switching plugin (i believe forum posts are just custom post types). You might need to do some re-write rules or something to make sure the links still work though. I would strongly advise you to try this whole scenario out on a staging or test server first before attempting it on your live site though.