I've raised exactly this topic before but from a different angle. Back then I needed to handle location audio. But again for even what is a fairly trivial job that I shot and recorded myself having TC in an audio track would have made the job flow so much easier.

This was a training video.
We had a script, yeah!
I decided we'd record the dialogue first. Thanfully I had my trusty HDD recorder in the car. Several hours later we had the dialogue in the can. Needless to say as the client read through the script they realised there were many omissions. No worry says I, we'll just record the needed sentences at the end of the session or at the end of a section as we realised what was missing.

So back at base, I start cutting the audio to the revised script. Problem is keeping track of where the words and sentences came from. For sure if I'd done this in a VO studio with a pro VO person every bit would have been a single file with idents, bravo. But it wasn't and it shouldn't need to be. Even if it was I'd still need to listen to the idents to know where I was at.

Having TC displayed in the audio events the same as we get with video would have made the job just that much easier. One possible work around would have been to render the long audio file as an AVI. But how daft is that, I'd have to keep the vision track visible just so I can see the TC!

This isn't a trivial issue or just something I'd like for my own oddities. Over the years I've transcribed a lot of spoken word titles and from the number of bloopers that have made it into final masters it's obvious the industry has a need for this kind of functionality. Why don't we have it, it sure doesn't seem that difficult. As far as I know a .wav file can include metadata. BWF files do have TC. My recoder doesn't record TC unlike the expensive pro units but I'm not asking for that. I'd gladly rewrap my audio just to get some form of time markers into the audio events on the timeline.

Bob.