if (Integer.parseInt(Build.VERSION.SDK) >= 4) {
    Log.i(PathActivity.TAG,"API version "+Build.VERSION.SDK);
    log.append(separator + "CPU: ");
    log.append(Build.CPU_ABI); //Log is a stringbuilder
}

gives this:

08-21 03:11:47.038: WARN/dalvikvm(1140): VFY: unable to resolve static field 11 (CPU_ABI) in Landroid/os/Build;
08-21 03:11:47.038: WARN/dalvikvm(1140): VFY:  rejecting opcode 0x62 at 0x0207
08-21 03:11:47.038: WARN/dalvikvm(1140): VFY:  rejected Lcom/mgamerzproductions/logthis/IntenseWorker;.buildLogString ()Ljava/lang/String;
08-21 03:11:47.038: WARN/dalvikvm(1140): Verifier rejected class Lcom/mgamerzproductions/logthis/IntenseWorker;
08-21 03:11:47.128: WARN/dalvikvm(1140): threadid=3: thread exiting with uncaught exception (group=0x4000fe70)