Right on schedule, my new "Ask Dave" podcast started today. Each week I pick a question (sometimes two) and answer with a video capture.
One thing worth noting: the idea behind the podcast is answering as many Photoshop questions as I can, one or two each week. I'll try my best but I can't guarantee that I'll get to every question. Please remember, the "Ask Dave" podcast is not the place to get a quick response :)
If your Photoshop question is "urgent" and you're a NAPP member you might want to send your question to the Help Desk or post it in the NAPP forums. You could also try the forums over at layersmagazine.com.