My anonymous source, Tom at Encirca, tells me that landrush period for the .PRO registry is showing that old sign of strength for a domain – interest in generic names.  So names like commercial.law.pro and tax.cpa.pro and healthy.med.pro are going fast (I made those up as examples, btw).  Encirca is an accredited registrar for .pro, so Tom ought to know.  There is both a sunrise period and a UDRP for .pro.