My brother and I have recently published an application to the Android Market that implements the mimics the Mobile-OTP reference implementation. I am proud of this for two reasons:
1. This is my first application into the android market.
2. I believe the features of this applications are better than the other MobileOTP clients I have seen thus far.
Our implementation allows for multiple profiles; essentially this allows a user to store credentials for multiple servers. Also, instead of remembering codes such as "#**#" to initialize a device, our client has easy to navigate menus that follow traditional Android applications' feel.
Here are some links