we experienced technical issues with DataCite email accounts between February and March 2011, which may have resulted in undelivered messages. All technical issues have been resolved, but please let us know if you have contacted us in the past two months and have not yet received a response.
Sorry for that.
Oh and by the way: Next week we will have a new refurbished website out, that should be alittle easier in navigation and accessing information than the last one.
I will keep you informed.