InfoPath 2003: Service Pack 1 (SP-1) & Toolkit for Visual Studio .NET Preview
Patrick was right: InfoPath 2003 Service Pack 1 (SP-1) Preview can now be downloaded.
More control choices, including Master/Detail, File Attachment, Recursive Section, and Choice, as well as custom-authored controls..
Better schema support, including built-in support for schema changes.
Printing improvements, including page breaks, margins and print settings.
Improved e-mail deployment of sandboxed solutions and auto-updating of trusted solutions.
Better management and categorization of solutions.
Tablet PC support improvements.
Increased support for rules and roles for declarative business logic.
Enhanced XPath expression support, including calculations without writing script.
Additional data adaptors for email and SharePoint Products and Technologies lists.
Better support for custom migration plug-ins.
Enhanced Object Model (OM), including OnSave event, offline state, submit, and digital signatures.
Improved support for secondary data sources.
Additional support for business logic written in managed code (requires a separate download).
Enhanced OM for external automation and windowless mode for application-level calls.
Better support for ADO datasets and diffgrams to round-trip data changes.
Additional support for complex scripts, such as right-to-left and South Asian languages.
Enhanced support for digital signatures, including partial signatures, non-repudiation, co-signing, and counter-signing.
Improved stability and performance, including auto-save and data recovery.
Update: Patrick was first again. :-) Sorry for re-posting.
Update2: InfoPath 2003 Toolkit for Visual Studio .NET can be downloaded too. (The Microsoft® Office InfoPath™ 2003 Toolkit for Visual Studio® .NET is designed for developers who are interested in creating form templates in InfoPath 2003 using Visual Studio .NET 2003.)