Here what we just received from Google (we received the same mail for Quiziwiki:

Thank you for developing your Android application ‘Omnidar ADC2 Trial’ and participating in ADC 2. Unfortunately, your application was not selected by Android users as one of the top 20 in its category.

According to the scores submitted by users, your application ‘Omnidar ADC2 Trial’ ranked in the top 50% of all applications submitted.

We appreciate your taking the time to develop and enter your application. We strongly encourage you to continue working on it and submit it to the public Android Market, where it can be downloaded and enjoyed by Android users all over the world.

Thank you again for your participation in ADC 2.

Sincerely,
ADC 2 Support

Thanks everyone for your support.