Microsoft has released BizTalk Server 2006 Trial Software

Microsoft BizTalk Server 2006 enables you to connect diverse software, then graphically create and modify process logic that uses that software. BizTalk Server also enables information workers to monitor running processes, interact with trading partners, and perform other business-oriented tasks.

Important additions in BizTalk Server 2006 include:

Better support for deploying, monitoring, and managing applications
Significantly simpler installation
Improved capabilities for Business Activity Monitoring (BAM)
BizTalk Server 2006 also uses the latest releases of other Microsoft technologies. It is built on version 2.0 of the .NET Framework, for example, and its developer tools are hosted in Microsoft Visual Studio 2005. For storage, the product can use SQL Server 2005, the latest version of Microsoft’s flagship database product, or SQL Server 2000, the previous release. BizTalk Server 2006 can also run on 64-bit Windows, taking advantage of the larger memory and other benefits that this new generation of hardware offers.

BizTalk Server 2006 Trial Software