For the record, this will re-enable dsiwarehax from software documented
here. You'll have to buy one of those games - though I wouldn't until everything's finished and released. There's ways to get around buying DSiware (probably), but I don't have any interest in researching those since the DSi Shop still has exploitable software for sale.
Also fwiw: DSiWarehax = SD access, no gamecard access.
DSi savegamehax = gamecard access, no SD access.
This is controlled by a one-shot register that we can't do anything about. DSiWarehax is definitely ideal since loading over wifi is so tricky and inconvenient.