I've uploaded a new drop of Power Collections. This is quite close to what will be released as the 1.0 release of Power Collections, there are just a few more things to do (mainly making the classes serializable). You can consider this the “Beta“ release of PowerCollection 1.0. Any feedback that can be provided will be very useful to getting the final 1.0 release as good as possible. I'm aiming toward the 1.0 release at the end of June. I'm short of time right this minute; I'll post more details soon on the changes since the last drop.

The download is available here, and the documentation can be browsed here.