Nick over on the Windows Vista Blog has put up an article describing what is available in the preview of Windows Search 4.0. Which should improve the search experience in Windows Vista.
You can read the detail in the article below, but a quick summary of the improvements are around performance, bug fixes and improvements for enterprise environments in areas such as Exchange Integration.
If you want to read the entire KB (Knowledge Base) article click here, or if you want to just go straight to the download centre to get it click here, this is the 32-bit Windows Vista and Windows Server 2008 package.
I am downloading it now!
But on the subject of learning something new everyday, I was reading the comments and found out that by pressing F3 on the desktop it pops up the search box, thanks to Dovella for that