Google added voice search feature on google search page.
As of now they only support US English. But soon they might start supporting various languages.
As mentioned on Google
http://www.youtube.com/watch?v=Q1c0w5QiryM&feature=player_emb
edded
Useful For Hard-to-spell searches Makes searching words you're not sure how to spell quicker and easier. Longer searches Search long queries, even really, really long queries, just by talking. Searches that are just more fun to search out loud Now you can ask your computer anything. Searching without typing Use it in the kitchen, in the garage or anytime your hands might be full.
