According to reports, a Japanese gamer has been able to rip the HD DVD exclusive Transformers and manage to successfully get it running on the PS3 via burning it on Blu-ray.
The steps involved to his success include the following - rip of a EVO file of the Transformers HD DVD, usage of EVOdemux to rebuild the necessary image, convert EVO file into BDMV format via TSremux and lastly burn onto BD-RE with Ulead.
The only major limitiation to his method so far is that subtitles don't transfer over.