Rod Crawford and I have summarized much of the data we've gathered thus far on pine cone spiders in Washington state in the paper A survey of spiders found in fallen pine cones in eastern Washington State, published in Vol. 74, No. 4 (2014) of Western North American Naturalist. Read or download the .pdf here.
Update (Nov 2015): The WNAN editorial board has given our paper an honorable mention in its Outstanding Natural History Paper of 2014 ranking.