We are migrating our current intranet to Drupal 6 and there is a lot of data within the current system which can be classified into:

• List data, general lists of fields. Common use is phone list of the employees phone numbers.
• Document repository. Just basically a web version of a file share for documents.

I can easily get the data + meta infomation out, but how do I bulk upload the two types of data into Drupal, as uploading the hundred of thousands of items manually is just not acceptable.