Search: Google, Bing, Web URL
Jobs: Indeed, LinkUp, US.jobs
Reference: Wikipedia, WolframAlpha, Answers.com
How To: eHow, Benefits.gov, wikiHow
Media: Google Images, Bing Images, Flickr, Photobucket, YouTube
Medical: WebMD, PubMed, HealthLine
Social: Twitter, LinkedIn, Facebook

You can change the voice recognition language in the Settings Page.

Arabic, Chinese (Mandarin), English (US), English (UK), French, German, Hebrew, Italian, Japanese, Korean, Russian, Spanish.

To open the "share" action sheet, on the result page, tap the Action Menu button (gear at top right), then tap "Share".

Actions: Copy, Email, Open in Safari, SMS, Logout Services
Services: Twitter, Facebook, Readability, Tumblr, Instapaper, LinkedIn, Diigo, Pinboard, Google Reader, Delicious, Kippt, Vkontakte, Pocket