http://www.ibm.com/developerworks/lotus/library/notes8-new/

Eclipse-based Lotus Notes V8 enhances the Lotus Notes user interface, reinforces its collaboration and messaging strengths, and extends its application development model with state-of-the-art programming constructs. Read more about what’s new in Lotus Notes and Domino V8.

Lotus Notes 8 Programmability

To understand the Notes 8 programmability story, you must first understand the new technology that has been introduced with Lotus Notes 8. The Lotus Notes 8 client takes all the code that is the existing Lotus Notes and puts it in the Eclipse environment. This puts Lotus Notes on an open-source, Java™-based platform.