Hi,
"Sofort" is already in our TODO list for payment plugin, like more than 50 other payment method.
In each release, we try to add one or two payment plugins.
The priority in the TODO list depends on the number of request, the importance of the payment plugin and if someone really want to and want to pay for his development.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.