This is the documentation for the development version of IPython. I don't think they care that they're "missing out on installs" by releasing documentation about what's changed in version 1.0
However, if you'd like to try out IPython 1.0, it's an open source project. You can checkout the latest code at https://github.com/ipython/ipython
However, if you'd like to try out IPython 1.0, it's an open source project. You can checkout the latest code at https://github.com/ipython/ipython