The CloudShark package is available in the trunk releases of OpenWrt, named Barrier Breaker. The Beginners’ Guide to OpenWrt and the instructions on choosing a version contain information on installing OpenWrt. Be sure to choose a Barrier Breaker image of OpenWrt to be able to install the CloudShark package for OpenWrt.
Once OpenWrt is installed on your device you can install the CloudShark packages right from the web interface. Click on the Software button under the System drop down menu.
Find packages using the filter cshark and install both of the available