The idea came up on a recent RoguelikeRadio episode that developers should make Let's Play videos of their own games. I've actually already done a series highlighting The Path of No Return (the hardcore dungeon) in Voyage to Farland, but there was no commentary and it's all a long spoiler video anyway.
However, I wanted to test out recording video and commentary separately so I threw together a couple of videos today. They aren't super exciting, but it was fun to test out the technology - Hypercam for the video and Audacity for the commentary audio.
Have a look at them here:
Hopefully I'll get a chance soon to make some videos of the harder dungeon floors in the game!