GDB development was slow for some time, but has been catching up in the last few years (Tom Tromey says GDB is going through a Renaissance). The GDB 7.0 release will ship some exciting features (like Python scripting support, pretty-printing, non-stop multithread debugging and others). I believe we now have the manpower to modernize GDB even more, in order to help Linux developers.
Hence, we could have a miniconf to bring GDB developers and users together to brainstorm on what we should work next: what are GDB's biggest weaknesses, and what would be killer features to have, for instance.
The people to call are a subset of (or even the whole of) the current active GDB developers and maintainers: Daniel Jacobowitz, Joel Brobecker, Pedro Alves, Tom Tromey, Hui Zhu, Thiago Bauermann (yours truly), Doug Evans, Pierre Muller (sorry if I forgot someone).