I'm in the same order group as you if I'm not mistaken. This was sobering as I did the maths and Marto would owe me an additional 400ghz to to currently earn what I would have if he delivered within his 4 week window. I doubt there will be any type of customer care here, he already got what he came for. Even buying with paypal is a huge risk as seen by the Marto/btcminer84 fiasco.
Yeh, its quite some hit, I really think its time that some offer was made. However just getting the GH paid for, seems a huge issue at the moment.
Its a real shame as I believe they are good products and I think martin is really good at the technical aspects of his projects.
Unfortunately, I believe anyone making future purchases should seriously consider time dependent escrow arrangements.