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Mac users can use Audacity (free app) to speed up the MP3 without changing the pitch. That way you can shave 30+ minutes off the podcast. I'm sure there is a Windows app that can do the same thing.
Welcome to Serious Compacts, Robert! I should probably speed the whole thing up in Audicity, if only by 5% or so, before uploading. I think I did that for Episode 4 but forgot it this time. Btw, Audacity is cross platform (Mac, Windows, Linux, and more).