I don't know if you have seen this..
www.entourageedge.nl (but I don't think the site is in english which could be interesting...)
or
www.entourageedge.info. (which is also not in english....) but i'm sure there might be a way to change the language.
anyways. this probably isn't very helpful, but on the off chance you speak... i think it's german... then you might be in luck!
try contacting the sales team directly. They may be able to give you an idea of how when the device will be available.