Ive found a utility that allows you to drag and drop emails from Outlook into STS and SPS site document libraries and it works a dream.
It consists of a webservice that runs on the server and a dotNet client that adds into Outlook, both use dotNet 1.1
Now I know that Office12 might do something similar, but its a long way off, so until then this works and its FREE from a UK company. at http://www.tesl.com
Update
Release 3 (Beta 4):
Note: we have released this, though still in beta as we haven't tested as much as we would like to, because it is stable and we have high demand for the new features. New features include:
The ability to upload mail messages to announcement lists and discussion boards. The mail body is used as the item body text and the mail message is added as an item attachment.
Support for dragging and dropping many objects, not just mail messages. E.g. attachments and files from windows explorer.
The ability to run in the system tray so that you can use it outside Outlook.
Extension points so that developers can add support for custom metadata
Various bug fixes