The speaker introduces GNU-Poke, an extensible editor for structured binary data. They explain that while there are many simple binary editors available, they are often limited in their functionality and lack extensibility. Specialized binary editors exist, but they are not easily customizable. The speaker then introduces Poke, which allows immediate editing of binary data and the ability to define complex data structures. Poke operates on bit addressable I/O spaces and supports various types of binary data, including bits, bytes, and arbitrary units. The speaker discusses how Poke can be integrated into other programs, such as the GDB debugger, and explains the current status of the project, including recent releases and plans for future development. They also mention the PokePickles, which are packages that contain predefined structures for handling specific binary formats. The speaker concludes by inviting listeners to join the development of Poke and providing resources for further information.