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Brian McGill of the University of Maine. School of Biology & Ecology has published a long post on his blog Dynamic Ecology" on the many problems posed by the transition from subscriber-based publishing to author-paid publishing in "Open Access and the Reality of Getting from Here to There."
He warns that the transition period marks a "suboptimal valley" where there is no clear model for publishing and that our decisions may actually prolong the lenth of time we spend in that valley.