Сегодня пришла рекламка от db4o — показались интересным две новости:

"Sharpen" Translates your Java Application Sources to C#
*db4o opens its "secret tool" so that everyone can benefit from a super smart db4o created "cross-platform" Java-to-.NET translator. To learn more, and to find the repository, documentation and bug tracking for "Sharpen" read this blog post.
*Get started on how to use "Sharpen" with a sample application and short startup guide.
*You are all invited to enhance and augment to fit your needs. Please give us your feedback in the Sharpen forum.

Ну о подобных системах слышал, правда юзать не юзал. Не было надобности. Но теоретически Java на шарп переносить несложно(кроме некоторых вещей типа выгрузки классов). Обратно немного сложнее.

db4objects is Leading a Community Effort to Promote LINQ for Java
* LINQ for Java follows db4objects approach of Native Queries. To know more about this initiative read Carl's blog.
* Having a common interface on .NET and Java that is natively supported would create a easy to use, efficient standard for database developers.
* To read along or participate in this effort join the JLINQ group.

Вот я абсолютно не понял... Невозможное возможно? Язык будут менять, и дорабатывать? Доработка то будет кардинальная.