Unity hates my super key

It appears the package dell-super-key is the culprit. I presume there is a hotkey combination to disable the super key on Windows and Dell wrote a shim to extend this functionality to the dev edition.

I however, cannot find any key combination that I could've pressed to clear the lock.

EDIT:

Oddly enough this is intended behavior.

mikey@mikey-XPS:~$ apt-cache search dell-super-key
dell-super-key - Disables the super key by default.

I found (dpkg -l) and emailed the package maintainer, Dell is legally required to include this package on their sputnik devices. It is safe to remove, and can be reinstalled from the recovery partition.