I've published quite a few pieces on this field over the last ten years or so. The latest feature is pegged to the strategy plan for UK regenerative medicine that the Medical Research Council together with other funding agencies released at the end of March.
A roadmap for regenerative medicine
Current Biology, Volume 22, Issue 8, R251-R253, 24 April 2012
(NB: my features remain on free access only until the next issue appears, i.e. normally 2 weeks, sometimes 3, and they return to free access a year after publication)