Interferon

I only recently learned about these, but it is a big deal if you are doing any government business. Do you have any documentation on this? If IPS is already building with this in mind we can literally save tens of thousands of dollars.

I suggest a default dark theme in addition to the white theme. Everyone is going this way because it doesn't fry your retinas after looking at the screen a long time, and it would make the process of creating dark themes much simpler if there was a good starting point.

You also want to have the server send out one email a day after they register, another email three days later, another one seven days later, etc. to keep the customer engaged.  You just preconfigure a bunch of emails to automatically send out in scheduled intervals.  Hubspot costs big money to do this.

Apparently MailChimp also has automatic email campaigns.  So if you set up the MailChimp plugin for IPB that should handle everything you need.
The only problem an IPB feature would solve is that Mailchimp is quite expensive for large lists.

I'd like to see a replacement for MediaWiki, even if it doesn't support as many features. Our online documentation is mostly written by the community in the wiki, and it would be nice if we could consolidate the wiki together with the forum/blog/profile system. Migration isn't even that big of an issue, since it is easy to copy and paste an article.

All it needs is articles any authorized user group can edit. I'd make it simple in structure and just let the users define the layout of the articles.