The personal assistant will now include better responses and several integrations, incluing OpenTable, Rotten Tomates, Yelp, and sports data. Siri can also now launch apps, update Facebook or Twitter, and speak more languages.
According to Apple, Siri is optimized for use in 15 countries. In addition to English, French, German and Japanese, Siri can now converse in Spanish, Italian, Korean, Mandarin, and Cantonese.
Apple is also working with automakers to integrate Siri into cars through a "Eyes Free" feature, which will allow drivers to use a button in the steering wheel to activate Siri. The feature is coming in the next 12 months for several car companies, including BMW, General Motors,Toyota, Mercedes, Honda, and Audi.
Siri debuted with the iPhone 4S as a beta product last October. The "S" in the iPhone 4S moniker stood for Siri. The feature uses the iPhone 4S' built-in microphone, taking user commands and turning them into actions on the phone. That includes searching the Web, setting reminders, and checking stock prices.
During anat the recent D10 conference, Apple CEO Tim Cook hinted that the software had an upgrade in the works, noting that "a lot of people" were working to improve the technology.
Update, 1:23 p.m. PT: Updated with more information.