We're still in a holding pattern for a coordinated gnome-pim 1.1.0/gnome-pilot ? release of the CVS HEAD branch. Eskil is hoping to have gnome-pilot ready to go by the end of the week, so expect a release around then.
I started sketching out the design for integrating iCalendar support into gnomecal, but will probably hold off on starting coding until we release HEAD. Release, *then* introduce breakage. :)