Wayland 1.0.1 was just released ten days ago but Kristian ended up deciding to release Wayland/Weston 1.0.2 ahead of schedule. The reason for the early releases are due to important bug-fixes and "stable releases are cheap." The original plan was to release v1.0.2 after the Weston Test Suite landed.
Wayland 1.0.2 supports a new entry point for avoiding triple buffering in Mesa and with the Mesa 9.0.2 release coming out soon it can depend upon this newer version of Wayland. There's also another important fix in Wayland 1.0.2 to avoid a premature exit with potential memory corruption. Weston 1.0.2 fixes meanwhile are relatively modest with nothing major.
The concise release announcement can be found on the wayland-devel list.