Before we get too riled up, I do think that it is possible to do a "splice"-style hack to the EVSE that would preserve the EVSE's safety features. If one were to use a relay or relays to open/close both the 240v hots spliced in based on whether there's 120v present in the output from the EVSE, and if the spliced in 240v cord provided its own GFCI, I *think* all the safety features and timer/etc functionality would be preserved. However, I doubt one could achieve much of a profit margin doing this for less than the rev1 upgrade from evseupgrade.com, plus there's the inconvenience/tackiness of needing to plug in to separate 120v and 240v circuits.
That said, I see nothing posted here or on the website to indicate that either of these features has been implemented; in fact the mention of the yellow warning light and the failure to work with a charging timer leads me to believe that neither has. I would love to give themotorman the benefit of the doubt, and would love for him to step in and prove us wrong, as he was an active forum member before offering this service, but I think offering such a service without maintaining these safety features (and not clearly stating so on the website) is downright irresponsible. Also, most of the website is blatantly plagiarized from EVSEupgrade.com, which is just messed up, if not illegal.