ArcObjects Metadata Property Names
If you use the IMetadata.Metadata property in ArcMap or ArcCatalog through VBA, you get an IXMLPropertySet object back which has a whole slew of metadata element properties.
I derived my list programmatically from data in our SDE database. Now that I think about it, the set of properties probably varies depending on the metadata choices made for the feature class from which I derived the list and probably also the metadata style (iso or fgdc).
Here is the property list that I was able to generate:
Esri/CreaDate
01, May. 2008
Last Updated ( 16, Dec. 2008 )