A few months back I looked at how to create a helix in Revit 2010 without the need of any heavy math. Zach Krone and BIM troublemaker did similar examples on there blogs with varying degrees of complexity.
So I figured the other day that there must be a smarter way to do this in Revit 2011 with the new adaptive component tool. Take a look at the youtube Video for more info.
With a bit of messing around you can end up with something like this. :-)