If you turn Siri off you have voice control back.
Easy... like sunday morning.
It would be nice if it would simply switch back to voice control, when it's having trouble connecting to the network or to the Siri Apple Server though. I mean, having it tell me, there's a problem right now and to try again later when all i am asking is for it to play "xx" song, is kinda frustrating.
I don't think it should be too difficult to implement?
I've been rather unimpressed with Siri (and yes, I know it's a beta), as someone once put it (forget who), with Apple products promising new features that "JUST WORK", I've grown accustomed to seeing this promise fullfiled. However, with Siri, it's been a bit disappointing.
I agree with most posters, that limitation to the US for maps, also was kinda frustrating. Some of the coolest demonstrations are its ability to tell you where is the nearest restaurant or hospital... I really hope they open it up to the rest of the world in iOS 6.
Also on my wish list for an update of SIRI:
Ability to easily switch between languages:
I'm bilingual English-French and I would like to be able to quickly switch between these languages, either to use the dictation features or just speak the commands in different languages.