I have been using this since 0.7. It is without question what makes PowerShell the ultimate tool for me.
In your comments you mentioned that you had hoped users would get interested in the library and learn and extend- Well it worked for me. I have drawn on this and many other examples in your blog extensively in my learning to use PowerShell productively.
I have been adding a section for some time to use with svn repos (and sometimes IE) where if it's a valid path and ends in = (I just picked something not in use at the time) it creates a new Uri and returns the AbsoluteUri. This is much nicer than changing all the \ to / etc. So C:\abc\def\myfile.htm becomes file:///C:/abc/def/myfile.htm
You have a great Blog. Thanks for all the time you spend teaching others.
Regards,
-Alan