I recently ran across this CodePlex project that lets you set permissions on the columns in a SharePoint list. It lets the permissions get set down to the type of form being opened. This specific requirement has come up many times, so this feature is a great enhancement to SharePoint. It can be found at: http://www.codeplex.com/SPListDisplaySetting

March 12, 2008 at 1:42 am
[...] Column Permissions in SharePoint List [...]
September 24, 2008 at 5:38 pm
The codeplex site lists this as not being published…no help here.
December 16, 2008 at 2:23 pm
Got System.Exception error while installing on 64 Bit Windows 2003. Is there any solution for this?