"[T]he Federal Circuit said the patent application in question -- a method for reducing the risk of sudden changes in energy costs -- was not a machine and did not result in a transformation." (FTA)

The article seems to say the method is not a machine, which doesn't make much sense. Business method patents are still allowable if the process "is tied to a particular machine or apparatus."

See here for more background: http://www.patentlyo.com/patent/2008/10/in-re-bilski.html