ZedGraph official release version 4.3 was posted on March 5th, 2006. This version includes many updates, bug fixes, and enhancements since the last release. Also, the demo/samples have been enhanced to be more complete implementations of the use of the ZedGraphControl from C#, C++, and VB.
Also, ZedGraph now has a Wiki for documentation, tips, and information. Please check it out at http://zedgraph.org. We're looking for contributions in the wiki on problem solutions, samples, and general help.