People may be aware of the recent research which suggest that the lumpiness of the universe explains the disparity between predicted and measured rates of expansion and that dark energy is not a necessary construct to explain observations. This was briefly reported in AS&T's current issue.
I found a podcast on ABC News Radio's Star Stuff program in which this is elaborated on in a way that I could actually understand. I also found the implications quite fascinating. Here is the link for those that might be interested:
http://www.abc.net.au/newsradio/txt/s2164363.htm