In a previous post I indicated that to enable the ability to upload multiple documents to SharePoint v3 you need to have MS Office installed. I neglected to show the interface to allow this once you selected the option to upload multiple documents. So here it is:
Once you have selected the Upload Multiple documents from the document library menu you will be presented with the window you see above. Simply navigate through the folder list on the left and select the desired files on the right by placing a check in the box in front of the filename. When you then hit the OK button all these files will be transferred into the current document library.