I was looking at 3.0 networks and I was thinking of some new modules for them.
Such like a link directory, where you have like minded sites added, you see a thumbnail, and you are able to click the link/see a description, hardly no sites have these anymore.
Games Page - probably no storage for this though, through a plugin (maybe a paid for the month module) people can activate games or arcade for their networks.
Post to twitter in the newsfeed like the old newsfeed from 2.0
More template and theme options - smilies, and emoji.
Ability to import themes from wordpress, blogger or other theme type sites.
Store Module, for a site like craigslist, or even one with a payment cart build in like spruz network.
Make photos load better and faster - smaller thumbnails and better photo view pages. They were also slow on 2.0.
Keep the former NING Light, which now goes to 4.0 Beta. 4.0 is a cms like wix. I understand innovation is good, but ningers will miss the social membership capabilities.
* Add html boxes to Ning Light plan if a member is paying for their Ning light as a module. <--- They need those html boxes!
* Web RTC support - allow Ning to go live like facebook - hold watch parties. Added maybe as a monthly add on paid for module.
* Ad supportive Module for adding banners or images to a box like facebook or banner exchange, people pay for their banner/adverts and NC's set the price for the ad/per month or so on.