Hi Mark, Josh,
Another converter is Any PDF to DWG converter (
http://www.anydwg.com ) which works well. My next question is, is there any way to prevent a PDF drawing from being converted into a vector format as it is becoming an increasing concern to us where our work, once submitted openly to the Development Consent Authority, gets into the hands of contractors who employ cheap drafters who then convert the PDF's to CAD files and then approach the developer to undercut our work and offer a 1-stop shop for design+construct...without the architect