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Usual p8pbb bridge includes 'Recent Activity' and 'Forum Tags' modules.

... listings as the assigned property search module will be page/template specific. You can use module layout overrides for each Joomla template as usual. Second of all I would like to have the ability for the user to select the language of the site. I notice that joomfish is not compatable. Also ...

Each slave slave is treated as usual site by Google, it's completely up to you which contents to have in each site.

... database tables of main site (in either separate database or same database but with different tables prefix) and customizing each subsite as usual (edit template, modules etc.). Please ensure that your Joomla template doesn't store its settings in files but in database (database is used by ...

MightySites can either share ALL articles or not share them at all.
So there are 2 variants:
1. All sites use own articles as usual and each site controls own articles as usual.
2. All sites share articles, so unpublishing any article in any site will affect this article in all sites.

1 - Yes, but only in stand-alone mode (phpBB is display as usual, not inside Joomla like this forum which uses wrapped mode). Wrapped mode requires specially adopted phpBB styles. 2 - Yes, you can just redirect Joomla registration to phpBB page via /.htaccess. ...

... for all sites. I also have a concern for SEO - it is more effective for ranking to have separate sites and domains. Parked domain looks like a usual domain for Google. Please advice how parked domain can be less effective for SEO? with domains set up as parked domains it seems more like a multi ...

... list, THEIR logo, their template choice/colors. Sorry, I don't understand. Client can login to his site and setup all settings in Joomla as usual. 3. The parent company has 200 such clients and wants to write a new article that will automatically show up on all of their client sites. MightySites ...

There are 2 variants:
1. Content can be shared (all sites have same articles) .
2. Not shared (each site has own unique articles as usual).

Yes, I guess MightySites can help here. You will have a main site with usual hosting account, all clients sites will be parked domains with own databases. So one Joomla installation for all sites will be used. You want "it would automatically flow out ...