A quick spin of the Google wheel tells me this is not a completely new idea and I saw some warnings of decreased engine longevity and the like. The article does mention that this particular system is perhaps more sophisticated in that the LPG is injected as a vapor via "electronically controlled and custom mappable professional LPG injection system". There are other companies apparently selling similar set ups in Australia such as Team Green Autogas.
So is this all some kind of kangaroo-pie-in-the-sky or are these blokes onto something? Hit the comments to let us know.