I’ve been watching Jeff’s progress on this shell for awhile, and he’s finally posted a download.  jaMSH is an alternative to the default msh.exe that we ship, and has some very promising features.

It uses the GNU Readline Library as its input mechanism, so you immediately get gobs and gobs and gobs of command-editing features.  It’s also implemented a fairly rich tab-completion model (filenames, variables, members,) and offers a facility to load cmdlets and providers during startup.  This ability to dynamically load cmdlets and providers is something that we had to remove from our default shell because of the versioning problems it introduces, but we’re introducing a stronger (and more usable model) in the next drop or two.

It’s not yet at a state where I can use it as my primary shell, but I’m looking forward to seeing progress on this project.  He’s licensed it under the GPL – why not see how you can contribute?

[Edit: Monad has now been renamed to Windows PowerShell. This script or discussion may require slight adjustments before it applies directly to newer builds.]