On Android devices OS version 2.3 you will find them in the sdcar/agk/youAppName directory, lovely and secure...
On devices above that the data is properly stored in the app's data folder. Wish is under the root/data folder somewhere. The folder will have your app's package name (com.MyCompany.MyApp)
You will need root access to find this though.
If you do not want to root your device there are various backup tools out there that will allow you to backup all of the data on your device into a compressed file (I think tar). You can then explore that backup to find the data. While this method is slow it is a decent alternative to rooting (which is a little dangerous, can be a BIG pain, and has to be done over after a new OS update...).
An alternative to this is to build in your own system that will allow you to grab all of the files from your app's data folder on the device and send them to a server. You could easily use XAMPP for this and there is sample code in the appgamekit.com/documentation for sending files over HTTP. You can also look around and find help on reading the directories for all the files you need. This is the method we use for debugging and bug reporting in Wordspionage. It is great because we have a handful of devices and testers. None of them need rooting/jailbreaking. They just press a button to send the error/debug logs. I put in an automated process for this when we were testing the app so that any time a fatal error occurred it would automatically send me a log and the data files. I'd highly suggest this method.