About a month or so ago I inquired with Auber Instruments about making a DS18B20 probe for use with Arduino and other uC's and they obliged. It uses the same style QD cable as the pt100 probes making clean up easy if you have to pack away your gear after brewing like I do.
http://www.auberins.com/index.php?main_page=product_info&cPath=20_39&products_id=322
http://www.auberins.com/index.php?main_page=product_info&cPath=20_39&products_id=322