Microsoft Transporter Suite for Lotus Domino
Yesterday we released an updated version of the Transporter Suite for Lotus Domino or Generic POP / IMAP servers. This toolset can help you migrate from Lotus Domino to Microsoft Exchange Server 2007 and SharePoint. Users, groups, personal address lists, mailboxes, personal mail archives, and applications can all be migrated from Lotus Domino 5, 6 or 7.
More resources can be found over at TechNet.