User blog comment:Eto562/Jakobs Vending Machine/@comment-3469010-20120726170105

Nope, actually Gearbox said that it's a glitch.

@OP: It's sort of disappointing because I was looking forward to the Jakobs vendor too when I bought the DLC. But now, three add-ons later and with BL2 on the way, I don't think anyone will want to try and do something about it, especially since there are much better ways to get loot like the farmory or Elvis.