A while ago we’ve been doing a Proof of Concept for getting PeopleSoft data into SharePoint and back. In our case, we needed to get the data out of and old version of PeopleSoft, which was quite a challange. We used an iWay adapter to do that and that went quite well.
Today, Microsoft announced that they bought eight iWay application adapters for BizTalk. The adapters Microsoft purchased will help BizTalk Server customers connect more easily to third-party applications from Amdocs, JD Edwards, Oracle Corp., PeopleSoft, Siebel Systems Inc. and TIBCO Software Inc. iWay customers that have purchased licenses for the .NET-based adapters will receive a license for the corresponding Microsoft adapter with the purchase of Software Assurance.
Some information about integration with SharePoint using Biztalk and iWay on MSDN can be found here.