I installed and used SpeakToIt Assistant App on my LG Optimus M from Android Market. It is not close to Siri (iPhone iOS 5). However, it can perform basic functions easily with voice commands.
https://market.android.com/details?id=com.speaktoit.assistant&hl=en
I tried simple commands like:
Call JohnDoe
Open Calendar
Nearby Walmart
SMS to JohnDoe
What is 400 divided by 100
Open Android Market
Open Camera
Bye
The following article explores many other Android Voice Action Apps.
http://www.phonearena.com/news/Catc...look-at-voice-command-apps-on-Android_id23686
