I'm interested to see what Agilent's response is. In some respects it might be better for them to quietly do nothing - having a security hole like this is unlikely to have much impact with any corporate buyers - they're not going to mess about with dodgy license keys. Meanwhile the unit is more attractive to hobbyists who are otherwise not going to splash out on the expensive options and without the existance of a hack would just buy a cheaper scope from another source. So in the current situation, they might shift more units.
On the other hand, no-one likes to look like an idiot... so maybe they'll fix it just to save face.
Plus I'm intruiged to see *how* they plan on plugging the hole. Seems like introducing a new key would mean a firmware update, and they don't look awfully well protected. So existing units might remain hackable, provided people aren't too trigger happy in updating them. Indeed unless there's a serious problem in the current firmware, or they enable some extra features, there's probably little point updating.