So I have been reading code to be a better developer, specifically the PowerShell Community Extenstions source code. In so doing I ran across the Wintellect "sponsored" Power Collections library, which would appear to have been specified in 2004.
All I can say is "bravo" to Wintellect. Jeffery Richter is the bee's knees. In this library you'll find the collections the bridge the gab between what you would find in Java and C++ STL: Dequeue, Set, OrderedSet, etc. Shiny.