Seattle-based Pluggd has rolled out a new search function for podcasts, saying today at the DEMO confernce that it will allow users to search for segements within podcasts using its new HearHere service. The new service uses voice recognition software and search algorithms to index and search podcasts. According to Pluggd, the HearHere feature lets users type in a keyword, and see a "heat map" that indicates where the topic is discused.