Here's the output of the "Technical" section of my RSS reader. They're not all programming related, some of them are things like Seth Godin's blog who's a marketing guy but they give you some fascinating insights into areas which either simply provide inspiration or help you understand related areas of the job. There is admittedly a heavy Microsoft/.NET/C# bias:
A List Apart * - Articles written by a variety of people about all aspects of web design from programming to design.
All about Microsoft - A blog by the industry watcher Mary Jo Foley about her observations on Microsoft and what they're up to. The comments make for infuriating reading but the observations are sometimes interesting and insightful as to the possible future of certain technologies.
Amix - A software developer who's blogged about a couple of projects he's worked on. Has some good Python snippets.
Anne's Weblog - Anne van Kesteren is a developer on Opera (I think) and blogs a fair bit about web standards.
Ayende @ Rahien - An active member of the ALT.NET community and a developer of Rhino Mocks, a .NET mocking framework. Blogs mainly about architecural issues on both a macro and a micro scale, usually related to his work on the Rhino toolsuite.
Aza's Thoughts * - A developer at the Mozilla Usability Labs currently working on ideas for Firefox Mobile with some interesting prototypes. Son of the usability guru Jeff Raskin and carrying on his passion.
BCL Team Blog - The blog of the .NET Base Class Library team. Contains various tidbits about the BCL, but updated infrequently.
Charlie Calvert - Blogs about various .NET features.
Coder Who Says Py - Blogs about various Python stuff.
Coding Horror * - Blogs about various Computer Science issues in a pretty much language agnostic fashion (though with a very slight .NET bias).
Dare Obasanjo * - Blogs about .NET stuff, as well as general community issues.
Developing for Developers - Various general Computer Science topics. Not updated for a while.
Fabulous Adventures in Coding * - Goes quite in depth with various .NET and functional language features.
Good Experience * - Blogs about good usability experience, usually though not always technology related.
greg hughes * - Blogs about various technology related stuff.
If broken it is, fix it you should - In depth .NET debugging and profiling topics.
information aesthetics * - Interesting and varied ways of information visualisations.
ISerializable - An active member of the ALT.NET community and developer of Typemock (I think). Blogs about various .NET stuff.
Jensen Harris * - Member of the team behind the Office 2007 UI. Not updated in a while, but a lot of good information on research and justifications.
Joel on Software * - Articles on all sorts of Computer Science related stuff.
Jon Skeet - Blogs on C# stuff as well as more generic technical news and issues.
Luca Bolognese - Blogs on C# and function methodologies.
LukeH - Blogs on C# and F#.
Marquee de Sells - Chris Sell's blog on .NET and general technology stuff.
Onion Blog - Mainly ASP.NET and general .NET web programming.
Panopticon Central - Member of the VB.NET language team.
Presentation Zen * - Tips, links and general information on good presentations.
research!rsc * - Articles about the history of Computer Science.
Rob Miles - .NET Micro Framework, general amusing observations and involved in teaching C#.
Scott Hanselman * - .NET, general technology topics, Weekly Source Code and an ongoing WPF community collaboration project as well as an associated podcast.
ScottGu * - ASP.NET and detailed MVC Framework information.
Seth Godin * - An arguably not too evil marketing guy with some good observations and good writing style.
The Old New Thing * - A vast amount of information on the history of Windows and justifications for some of the more bizaar peculiarities of the API's.
You've Been HAACKED - General .NET related stuff.
Jomo Fisher - Lately mainly F# related stuff.
Those with *'s are one's I would actively recommend (though the others are all still good).