I might be behind the times but I just found out that MS released free charting controls for Winform and ASP.NET. Requires you be running VS2008.
Charting Component Download: Microsoft Chart Controls for Microsoft .NET Framework 3.5
Language Pack if you are using other languages: Microsoft Chart Controls for Microsoft .NET Framework 3.5 Language Pack
Visual Studio 2008 Add-On: Microsoft Chart Controls Add-on for Microsoft Visual Studio 2008
Microsoft also preserves an archived MSDN Magazine overview: Microsoft Chart Controls, Visual Studio Automatic Code Snippets, And More.
The original MSDN Code Gallery samples page linked from this post is no longer available.
I will be downloading later this evening and playing around with this but this is great to see MS finally release some nice looking chart controls.