Steven Martin posted on his blog that the next version of BizTalk Server will be BizTalk 2006 R3. You can get more info from his blog. But it doesn’t seem like the BizTalk vNext that people talk about with integration of Windows Workflow Foundation. That could just maybe happen in Oslo timeframe?
http://blogs.msdn.com/stevemar/default.aspx
Will be released in calendar year 2009 and since it will support .NET Framework 3.5 I guess development will be done on Visual Studio 2008.
Those keen to check out how latest version of BizTalk helps to realize the SOA vision can apply for beta testing at http://connect.microsoft.com
The OBA team has made Loan Origination and Public Service E-forms OBA RAP Virtual Hard Disk (VHD) available for download at http://connect.microsoft.com
 If you are in South East Asia region want to find out more about these OBA RAPs, do come to TechEd SEA 2007 and attend the follow sessions.
Office System & Messaging Track
- Microsoft Sharepoint Products & Technologies 2007: Administrative Architecture & Planning for Deployment, Part 1
- Microsoft Sharepoint Products & Technologies 2007: Administrative Architecture & Planning for Deployment, Part 2
- SharePoint Governance & Information Architecture Guidance
- Building Apps with MOSS 2007 Excel Services
- Reporting solutions in Office 2007 and SharePoint 2007
- Doc Management in SharePoint 2007
- Integrate LOB with SharePoint Business Data Catalog
Architecture Track
- Office as a Platform Architecture?
Developer Track
- Developing Real World OBA
- Open XML Architecture and Benefits
- Anatomy of OBA
- Workflow in real world
