Dave,
Don't take this the wrong way, but your audio sucks! I have a feeling you aren't using a external mic on your camera??? You may want to consider something like the Rode VideoMic. Its a lot smaller than it looks in the photo. Should fix like 98% of your audio problems.
I *DO* use a Rode VideoMic, have done so since Episode 40 or something.
Yes, the acoustics in my lab suck.
Yes, the acoustics in my car suck.
External mics are great, but they are not magic.
On what blogs does my audio suck?
The lab ones are OK I think?
The recent Open Source lecture sucked big time because I goofed a setting on my Zoom H1, so had to rely on the VideoMic in the conference room.
Sometimes, shit happens, and you don't get a second chance to record something, so I have to upload what I've got.
Dave.