For the upcoming StackExchange offering. Let's say that you wanted to make one for each of the 50 State's tax laws. What do you think would be the best way to organize that? Would you have to have 50 different versions, one for each state? Each state has differing and changing laws that are complex enough to certainly have the content. And people with questions would use it big time during tax season. Would you have to pay for 50 different versions or could you put it all under the same domain?
I think tags take care of this. Create a tag per state, and you automatically have an area for tax questions for that state. Plus, if a tax question relates to federal tax, a state-specific tax question could be tagged as federal, for example.