Shout out to the f-list

[chickenfeet]

This is a shout out to anyone who is familiar with current thinking on the "Daughters of Eve" and "Lucy" hypotheses. What's the current cutting edge thinking on the validity of mtDNA based analysis? I think I've seen heard/stuff that suggests that uncontaminated mtDNA is virtually impossible to find and that therefore the whole ball of wax needs to be treated with some scepticism but I might have been imagining it. Opinions and pointers to recent papers on the subject most appreciated.