Just some info about MS Office 2007
Microsoft has added some good overview tutorials. Here are the links to some of those:

This is a video overview of the new items in Word 2007.
http://office.microsoft.com/en-us/word/HA100484691033.aspx

Here are the power tips for using Excel 2007.
http://office.microsoft.com/en-us/excel/CH100740791033.aspx

Here is an overview the new items in PowerPoint 2007.
http://office.microsoft.com/en-us/powerpoint/HA100484621033.aspx?pid=CH101030561033

Microsoft lets you store it all online for easy access.
http://www.officelive.com/en-us/