The integration might be as simple as adding links between the 2 applications where it makes sense. An obvious example is the recipe page in both the layer index and the RRS.
Since the new RRS site don't use poky for layer and use the same CORE_LAYER_NAME (openembedded-core) it is possible to make links between apps. https://git.yoctoproject.org/cgit/cgit.cgi/poky-contrib/log/?h=alimon/RRS
RRS functionality is now integrated into the layer index, both in the code and at http://layers.openembedded.org/rrs/ .