Think I have the solution. I got the free app Mobiola xPlayer (Lite), you can easiler zoom through the podcast. It doesn't remember the last place but if you remember the minutes you can get there in a flash.
Though the price might not appeal to you, I second the vote for podtrapper. It is probably my most-used application for years and it works great. I love that it has a setting for rewinding a bit after a pause. And I love its other features. I am a fan. I can't remember what I paid, but it was worth it.