For those like myself who can use all the help they can get creating icons, Axialis has released the newest version of IconWorkshop in version 6.
"IconWorkshop loads, creates, edits, saves Vista® icons. Microsoft® Vista®, the next version of Windows to arrive, includes a new PNG compressed icon format".
Current owners can use the Help > Online updates link in the program to access the upgrade, which also includes a link to free "Image Objects" which makes creating icons easy and fun for the artist in all of us. Look for the link in both the tip dialog, as well as the release note dialog that pops-up after updating.
Have fun, here is a link as well http://www.axialis.com/iconworkshop/