D-BUS: a systemwide bus / IPC system
The link goes to a message by Havoc Pennington describing D-BUS, a IPC technology being developed for use in Red Hat, and perhaps as a future (think 18 months) replacement for DCOP and maybe Bonobo's IPC mechanism.
Sounds nice, at least what I can understand of the specs, and adopting it shouldn't cause any big trauma on the KDE side, since our DCOP classes are autogenerated by macros anyway. Hopefully, it may even be source compatible.
Lots more information, including the specs and an interesting take on KDE-GNOME cooperation by Miguel de Icaza if you follow the links a little.