I listen to a mix of science and technology podcasts with a few entertaining shows mixed in for some variety. Here’s my list:

.NET

.Net Rocks!
.NET Rocks! is a weekly talk show for anyone interested in programming on the Microsoft .NET platform. The shows range from introductory information to hardcore geekiness.
dnrTV
dnrTv is a fusion of a training video and an interview show. Training videos are typically sterile and one-way. Let’s face it, you can only take so much. But you need to see the code! In this format, you get the spontaneity of an interview talk show, and the detail of a webcast or training video.

Technology News

Cranky Geeks
A roundtable discussion about the week in technology with a focus on business analysis.
Diggnation
Diggnation is a weekly tech/web culture show based on the top digg.com social bookmarking news stories.
Mac Break Weekly
Get the latest Mac news and views from the top journalists covering Apple today. This roundtable discussion is audio only, and complements the video only MacBreak. Another great show from the Pixel Corps and the TWiT.tv network.
Security Now
A weekly discussion about all thing security
Systm
Systm is the Do It Yourself show designed for the common geek who wants to quickly and easily learn how to dive into the latest and hottest tech projects. We will help you avoid pitfalls and get your project up and running fast
Tekzilla
Embrace digital technology. Join the Tekzilla crew and make your tech work better for you. Or you can go live in the woods with an axe. Every Friday, Patrick Norton and Veronica Belmont deliver product reviews, computer help, tech tips on everything from iPods to camcorders, HD to the Internet, plus do it yourself projects.
This Week in Tech
Roundtable discussion about the latest trends in technology
Windows Weekly
A weekly look at all things Microsoft including Windows Vista, Office 2007, and Xbox from the foremost Windows expert in the world

Science Mornings on Triple J
Join Zan Rowe and Dr Karl, with a bunch of curious triple j listeners for a weekly injection of science, myth-bashing and answers!
Science Talk: The Podcast of Scientific American
60 Second Science
Daily quick fix of the latest science news from the team at Scientific American
The Naked Scientists
The Naked Scientists are a media-savvy group of physicians and researchers from Cambridge University who use radio, live lectures, and the Internet to strip science down to its bare essentials, and promote it to the general public. Their award winning BBC weekly radio programme, The Naked Scientists, reaches a potential audience of 6 million listeners across the east of England, and also has an international following on the web.

This Week in Photography
A weekly discussion about all things photography, from the latest camera models, lenses, shooting techniques and gear.

Scam School
If Harvard offered a PhD in deceit, this would be it. Award-winning magician Brian Brushwood takes viewers on an inside tour of bar tricks, street cons, and scams. If you watch carefully, you’ll never have to pay for a drink again!
Good News Week
This is my weekly fix of aussie comedy hosted by Paul McDermott, Claire Hooper and Mikey Robins