I just downloaded from the Microsoft Beta site the Java Language Conversion Assistant 3.0 bits. Version 2 did a very decent job at converting "pure" business classes, not so much with front-end elements (servlets and JSP). JLCA 3.0 is reported to enhance this a lot, and also add support for things like JMS and EJBs. You can find some more info here. Hopefully I will find some time to play with it (alas, C# 2.0, ASP.NET 2.0 and the rest of the Whidbey stuff is ahead on the queue...)