ok heres my idea and sorry if it has already been said.
Idea:
Personal Constructs would be a player owned program that a player could buy with info. A personal construct would be just a white area, a player could then use info and code bits with his/her code analyzer tool to create a set(Dojo, Coffee House, etc...) and in that set they could create objects such as programs that you can fight in the Dojo, or gun racks that you can pick a weapon from. A player would go to their construct through a hardline( and other players could go there as well if invited) it would load up as a white room with a console in the middle, then from the console they could load whatever sets they've created. And players would have to pay a weekly or daily info amount to maintain their construct. More ideas can be added to this.
The Good:
It would give players a home in the matrix, instead of just hanging out by the hardlines doing nothing but pvp. It would also allow people to show thier personality through their decorations and such.
The Bad:
It may be a bit too un-matrixy for some players and it may not work with facts stated in the movies or animatrix(i'm not 100% sure i havent watched them in a while)
If anyone has any things to add or wants to state why this cant happen just post it.