There are reports on blogs and on Twitter that Siri is experiencing a large outage which is frustrating users.
In my own testing it occasionally is a bit slow if you ask for a web search or ask for a restaurant, but it seems to be working after about six tests, so this may depend on your location. Fellow GBMer Josh is reporting it is down for him and some folks around him in a coffee shop as well.
I’m wondering if we need a Fail Whale for Siri?
UPDATE: Well, it looks like that was short-lived. Siri is refusing to talk to me now as well.