The financial guys have discussed this many times on this board.  PTSC has hinted about new accounting methods in the future, but as of now nothing new has been announced.

"Revenue from our technology license agreements is generally recognized at the time we enter into a contract and provide our customer with the licensed technology. We believe that this is the point at which we have performed all of our obligations under the agreement; however, this remains a highly interpretive area of accounting and future license agreements may result in a different method of revenue recognition. Fees for maintenance or support of our licenses are recorded on a straight-line basis over the underlying period of performance."