There's been a good amount of discussion about Siri on the new iPhone 4S. I for one, can not wait for better voice recognition. It's unclear if Siri will be available on the iPad 2 even though it contains the same A5 processor as the iPhone 4S. My guess is that the iPhone 4S has more than just an improved processor and RAM to handle Siri. I'm betting (and could easily be wrong) that the iPhone 4S comes with improved microphones and audio processors. Audio input quality is going to be crucial for Siri to perform its magic. I do not expect to see Siri on an iPad until the iPad 3 (or 2S).