Here are a few good articles that I have found.  Click on the 'Articles' link to go to the respective links page.  Also check out the Wiki on GoodVFPBooks.

If there are any links that you think are missing please send me an email.

Hentzenwerke Publishing

Building Middle Tier Object in Visual FoxPro

Object Oriented Programming Fundementals

Designing Your Own Framework

OLE Drag & Drop

Validation Algorithms

Developing and Debugging Visual FoxPro COM servers

Web-Enabled Database Applications

Test COM in Three Minutes with Ten Seconds Down Time

 ASP for FoxPro Programmers

A FoxPro Server

Using VFP COM Objects with Active Server Pages

XML Data Services in Distributed Applications

Handling Long Web Request with Asynchronous Request Processing

Load Testing Web Applications using Microsoft's Web Application Stress Tool

Vista FoxPro Rendering Issues