Previous discussion of the effort [1] from a NYT article on January 5th [2]. I think this was mentioned in the previous discussion, but Tom Evans is doing a great job covering this on The El Cap Report [3].

[1] https://news.ycombinator.com/item?id=8836763

[2] http://www.nytimes.com/2015/01/05/sports/on-el-capitans-dawn...

[3] http://www.elcapreport.com