Hi Mom,

No, they are not public domain, but you're right there isn't an
obvious link to that information directly on
http://office.microsoft.com/clipart at present. The 'legal' link
on the bottom edge of the page leads to a license data page but
this may be more helpful.
http://microsoft.com/mscorp/permission/default.mspx#EOAA

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I believe that the Clips-Online are public domain.  One of my colleagues is
concerned that they are not, and need permissions for use.  I have not been
able to find conclusive evidence on the web site and need to know.
Thanks for any help!>>

http://office.microsoft.com/en-us/tou.aspx
See the EULA

If you have a valid license to Office, you can use the clips:

  Personal items
  Business items, under the following restrictions:

   1. The clip should not be used as a part of your logo.
   2. If you are selling an item which depicts the clip, the clip cannot be
the primary value of the item ( you cannot sell a clipart collection or sell
a book of just clipart, etc)