MacBreak Weekly #235 (Part 1) starts off a great informative series (Part 1 of 4) to introduce the new features found in Automator and Services in Snow Leopard.
There are additional videos: #236 (Part 2)
, #237 (Part 3)
, and #238 (Part 4)
. More information can also be found at: www.macosxautomation.com