“protoPlex” was a project that ran during 2008, organised by Thomas Hounsell and overlapping heavily with the Longhorn 08 team. The aim was to build on a Longhorn build 3718 base, and develop some early plex concepts demonstrated by Microsoft.
February 2008 CTP
This was the only public release from the protoPlex project. It included a somewhat complete version of the “bluePlex” theme. This is the only release that was delivered as an installer. It was later circulated as part of an ISO with some other collected patches for build 3718.
greenPlex Internal Preview
This was an internal release of the “greenPlex” theme, distributed around the time of the February CTP.
Beta 1 release
This was due to be released publicly in April 2008, but for varying reasons, it never happened. Three themes are included - revised versions of the already-demonstrated “bluePlex” and “greenPlex” themes, plus an alternate “alphaPlex” theme, which was a lighter, softer blue than the darker, glossier “bluePlex” theme.