Great list... about Podcaster, you write:

"Sure, you can use iTunes and the built-in iPod app to listen to podcasts, but if youre an avid podcast listener (I regularly follow This Week in Tech, Buzz Out Loud, and Tech News Today) then the app Podcaster offers a better experience. You can download over the air (so that you dont have to constantly sync to a computer to get the latest episodes), you can skip forward and backward 30 seconds, you can increase playback speed to 1.5 times normal speed, and the app is even compatible with AirPlay."

I could be wrong... but can't you already do all those things with the iTunes store app (download podcasts directly) and iTunes app (skip back 30 seconds, anyway... as well as increase playback speed to 2x... and play anything to Airplay) on the iPod/iPhone?

It's all there already.