creating a sound and video podcast cheap and quickly

To create a cheap and easy sound and video podcast:
Disclaimer... it isn't real slick, but it's functional and something anyone can afford and very simple.

Use Powerpoint 2007 to create slides as usual
Use the add sound feature to narrate (record narration found in slideshow tab)(you'll need a microphone)
as you record your narrative, advance through your slides, powerpoint will prompt you if you wish to save your "timings"; say yes and your narrative with the slides progressing will run as you recorded it.
you can add some background music on the insert tab, sound from file (you can use public domain music)

save your powerpoint
convert your powerpoint to quicktime or some video type format and post it where people can "view" it, I use Wondershare's trial download, you can use it as long as you don't mind their embedded banner painted on as watermark, you can purchase the full product and there's no banner