@DSotnikov just released the video recording of the session from the PowerShell Deep Dive in Frankfurt (last year). In this video, MVP Kirk Munro (poshoholic) and I demoed a project we've been working on that let's you create proxy functions. Here's a reminder of the session abstract.
this session as they take a deep dive into proxy functions in
PowerShell. Shay and Kirk have been working together on PowerShell Proxy
Extensions, a powerful module that leverages proxy functions and makes
it easier than ever to create these powerful extensions to PowerShell.
They will demonstrate what proxy functions are and why they are
important, and then show how a little scripting savvy (and a really long
script) can make your life easier by allowing you to create everything
from very simple proxy functions that extend PowerShell to more complex
proxy functions that override existing commands, fixing bugs and adding
missing features at the same time, all while leveraging inline help as
much as possible.
The module we demoed is available at http://pspx.codeplex.com/. Unfortunately I won't be able to make it this year to the Deep Dive in San Diego, but if you're attending you'll get the chance to see the module in action, plus a very cool project, written on top of the PowerShell Proxy Extensions (PSPX) module.