ZedGraph version 3.0 was released on September 21, 2004. Yeah, I know it's only been three weeks, but some pretty dramatic improvements have been made. ZedGraph now handles gradient fills for most "fillable" items on the graph. This adds a very polished look to the output. Take a look at the sample on the home page at http://zedgraph.sourceforge.net.
In addition, this new version adds:
You can download version 3.0 from the ZedGraph File Release page.