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There are 91 answers already, some of them even useful and interesting :)

eSupport Home (http://esupport.sony.com/US/perl/model-home.pl?mdl=PRS500)

Flash tutorial: How to transfer pictures from your PC to the Sony® portable reader system (http://esupport.sony.com/perl/tutorial-display.pl?tut_id=445&mdl=PRS500)

Replacement parts: AC Adapter, Power cord, USB cable (http://servicesales.sel.sony.com/web/productSearch.do?searchOperation=modelSearch&modelNum=PRS500U2&searchText=PRS500)