Very disappointed to see that Audiosear.ch has closed its doors as of the end of last month. It was a really good podcast search engine and I always started my podcast searches there. If you're casting around (hah! See what I did there?) for an alternative, try Listen Notes which is excellent and indexes 415,107 podcasts and over 24.5 million episodes. It's a great tool and while I'm sorry to see Audiosear.ch go I'm not that worried since we've got this one as a great option instead.