[Ekshef]

Why, isn't that just called 'Super' key?

[SllX]

Why would it be? It’s the Windows key, not Microsoft’s rebadge of the Super key.

[awesome_dude]

I like Apple's thinking - Option key

Super key could arguably apply to the shift keys, because you are using a super set of letters (or am I reaching too far)

[lmm]

> you are using a super set of letters (or am I reaching too far)

You're not though. The original letters are not available, so uppercase is not a superset of lowercase. (Unless you're just stating your opinion that the set of uppercase letters happens to be super)

[eucyclos]

shift could be the metakey? Maybe too many syllables...