Sandy pointed me to letter to Nature by a group which has done some earlier pigmentation work, Two newly identified genetic determinants of pigmentation in Europeans:
We present results from a genome-wide association study for variants associated with human pigmentation characteristics among 5,130 Icelanders, with follow-up analyses in 2,116 Icelanders and 1,214 Dutch individuals. Two coding variants in TPCN2 are associated with hair color, and a variant at the ASIP locus shows strong association with skin sensitivity to sun, freckling and red hair, phenotypic characteristics similar to those affected by well-known mutations in MC1R.
All well and good, but do note that in the fine print that it is the odds ratio for OCA2 really jumps out at you.
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So ASIP is linked to freckles and non-tannable skin - was there an overlap with MC1R on these 2 traits, or just on the red hair trait?