I would love to see a PODCAST app for the AW, but if it doesn't come then I'll use the best workaround I've seen so far. Have itunes on your computer download the Pod, check the info (apple+"i") and then change the meta data so it's read as music, not podcast. It will automatically be shifted into your music and then just drag it to a playlist you want to sync to your phone and then to your watch. It will be played like a normal song.
Obviously, there are some steps involved, but I feel it's better than the two or three apps out there that want my info in return for use of the app. Apparently you can't change the volume in those apps either.
The way above is also free. I only listen to two Pods a week, so it's not a massive deal for me, but if you listen to them all the time, this method may be troublesome.
Hope this helps.