While the Penguin Wireless N USB wireless card works with Red Hat Enterprise Linux 6.x & Scientific Linux 6.x with the 2.6.x kernel the firmware is missing from these distributions. Fortunately for users this distribution specific bug is easily fixed by downloading the correct firmware:
1. Install the firmware
2. When prompted "What should Firefox do" select open with package manager.
3. When prompted with "Do you want to install this file?" click the install button