I've released version 0.23.0 of wheel, after verifying that its test pass against Python 2.6, 2.7, PyPy, Python 3.3 and Python 3.4. Most of the improvements in this release are from contributors. Thank you!
The most surprising feature to anyone who relies on wheel's own installer is that bdist_wheel now relies on post-install setuptools scripts wrapper generation - which is automatically provided by recent wheel-supporting versions of pip, or manually by the wheel install-scripts [distribution [distribution ...]] command. This change also removes the --skip-scripts parameter from bdist_wheel.