Their reply to the podcast timestamp thing (it's brought up to them ever week or so btw) is that to be able to do that they would have to change the file format used and they prefered to stay with .mp3 because of the versatility and ease of use by anybody on any platform.
Well if that's their reasoning, it's pretty stupid. Simple text on the bombcast page or timestamps written to the comment id3 tag inside the mp3 would be more than enough.
2 minute effort tops.