[tmgrhm]

For some reason I didn't even consider that you could control it via normal text input, but you're obviously right as that's what Siri will eventually use after the voice-recognition software is used. This totally widens the possible market then, you're right.

I think the main bottleneck at the moment though (and why Siri was limited to the iPhone 4S even though the 4 and 3GS run it perfectly) is due to server load. They simply don't have the infrastructure to handle all the requests.