Getting logcat from a tester's android device

The best way to do AFAIK is to install a Log application, such as: LogCollector: http://www.appbrain.com/app/log-collector/com.xtralogic.android.logcollector

By this way, tester can send log data to your email or message.

A useful tool to collect log messages remotely is www.remotelogcat.com - it can be used to store strings, or the logcat for the current application.

You need to add the permission:

<uses-permission android:name="android.permission.READ_LOGS" />

In order to read logs.