Yes, I agree its a good idea, if I were starting over building the blog, forums or event calendar today I would put them in their own folers. But the problem is for sites already using these features including mojoPortal.com. If we move the pages now we get a lot of broken urls in google search results and for pages that have already been bookmarked.
So, for new features I'm using new folders but I don't want to change existing features right now because I don't have time to figure out a good strategy for solving the broken urls and it is not so important compared to other things I need to work on.
Best,
Joe