A new feature in Leopard is the inclusion of an application called "Screen Sharing" - it is apparently based on Apples Remote Desktop. The Screen Sharing app (which Apple suggests we use via the iChat app where it is built in as a feature), is actually a separate application located in
/System/Library/CoreServices/Screen Sharing.app

Mac OS X Hints posted the following hint, which greatly improves usability of this app, by adding favourites and the Bonjour-Browser, - enter the following command in Terminal:

defaults write com.apple.ScreenSharing ShowBonjourBrowser_Debug 1