Hopefully some of the old developers will be coming to Cheetah. Modzzz had a mentions and hashtag module where you could use hashtags and mentions using the @ symbol that would notify members if they had been mentioned in an article or comment. I don't see everything needing to be built into the code base. What is needed is better hooks in the code base so that code modification for third party modules can be held at a minimum. I am not sure at this time what exactly but that should be the direction in my opinion.