If you want to catch a cheating spouse/boyfriend/girlfriend, or you just want to play James Bond, a software called Menage might just help you on your way. MenageMobile.com offers a software which claims can let you spy on anyone. The software features includes:

• Bugging capability - lets you listen in on conversations by calling the mobile phone with the software installed. The mobile won't ring but would instantly answer the call so the owner won't know that there's an incoming call, thus you will be able to listen in on the mobile phone owner's conversation. You can also listen in on live conversations when a specified number calls the mobile phone with the software installed
• Location tracking - Lets you track the position of the mobile phone
• Call History and Details - You can instantly view call history and details such as how long a conversation lasted even if the owner already deleted the call details from the phone memory.
• Sim card notification - You will also get notified when the sim card of the mobile phone with the menage software installed has been changed.

This software is currently available for Windows Mobile Devices, Blackberry, and symbian devices, and soon a version for the iPhone will be available.