Shout n' Snap Voice Activated 1.0.3
the author of this app says:
Shout at your phone, and it will take a picture of you. This is a voice activated camera! Don't have someone to take a picture of you and your friends? Well now you don't need one! Simple, and easy to use. Share your pictures on Facebook or Twitter. "The best Android app of 2010" -Android critic. Special Promotional Price $0.99
Audio sensitivity is controlled by a simple slider so that the app works in a quiet setting like a scenic view, or a loud bar. Full camera functionality includes: gallery, flash, zoom, change size of picture, and more!