The audio files for this are inside Camera.apk:
I tried 7zip, MetaMorph, and a few other things to replace these with silent ogg files, but Camera.apk would Force Close.
I ended up just decompiling Camera.apk using apktool version 1.4.1, replacing the ogg files with silent ogg files, recompiling, signing, and then replacing the stock Camera.apk/odex files.
The attached Camera.apk worked for me, with no autofocus beep, and no Force Crashes.
MAKE SURE YOU BACK UP YOUR EXISTING /system/app/Camera.apk and Camera.odex
IN CASE THIS DOESN'T WORK FOR YOU
Edit: To clear up some of the confusion, I'm going to explain the steps a little more clearly.
First, unzip the attached file as Camera.apk to the root of the sdcard ( /sdcard ).
Using ADB (original files will be backed up to /system/bak) :
adb remount adb shell # mkdir /system/bak # mv /system/app/Camera.* /system/app/bak/ # cp /sdcard/Camera.apk /system/app/ exit
Go to /system - Mount R/W - Menu - New Folder - Name: bak Go to /system/app - Move Camera.apk and Camera.odex to /system/bak Go to /sdcard - Copy Camera.apk to /system/app
You can just rename, move, or delete (after backing up) them.
The files are:
EDIT 2 (12/10/2011): I've added the Camera.apk from EK02 with silent focus sounds. The newer camera version seems to have a few more options in the settings than my first upload.