GSO have a new superview range out, the 5mm.
Spoke to Mike @ Bintel, and they will be getting some in (I'm not sure of the date, yet).
Reported to have 65deg AFOV, 10mm ER. I've seen it in the US for approx US$40.
Will be interesting to see what they are like.. 10mm is nice ER for a 5mm eyepiece.. just depends what the edge performance is like in a fast scope. They will be mostly unusable in a long focal length scope, I'd imagine. The seeing will just never support using them.
I'm hoping to be able to loan one for review once they are in stock.