Web Development 

• ASP.NET - Everything you wanted to know and do with .NET stuff
• 4 Guys From Rolla - The guys who've been into programming since Classic ASP days
• W3 Schools - One of my favorite ones
• Developer Tutorials - Lots of nice random articles
• Smashing Magazine - A site that's really good at digging for well designed sites.

 There are a ton of other sites that are useful out there that can help improve the site but these will just do for now.