As I have tweeted a few times over the last couple weeks, Siri is a better product in theory than in practice: 'she' simply is too inconsistent and too time intensive to really be worthwhile. The only pieces I find myself regularly using Siri for are sending text messages and location-based searches.
Because Siri does a good job sending SMS's, I figured I'd try sending a Tweet... after all, Twitter is fully integrated into Apple's iOS5. It should work, right? Strangely, it doesn't... and it's a big opportunity for Twitter and Apple. And why not also work with Facebook and other core applications? Or allow those core applications to develop atop / into Siri?
By the way: if you really want to update Twitter (or Facebook) via Siri, you can make it work via some clever workarounds.
