I'll start by posting up for download, Ver1 and Ver2 maps, converted into the latest formats so that they will load in single player or on your own server.
Ver 1 - Our first world - Sept 2010
Ver 2 - Second world - Oct 2010
Ver 3 (Terra) - Longest world to date, where most people got their start - Dec 2010
Area 51 - Staff Playground and Testing area - April 2011
Future Shift - A different type of map - May 2011
Skyland - Floating islands of fun - July 2011
Imperial City - Spring 2011 - The Imperial City recreation, almost 100% of this work was legit, cause Black crashed the server trying to get rid of the lake in the area using WorldEdit

Hangar 41 - Unknown - Not sure when Petergunsberger started this project, I offered up his own world so he could work on it in peace and it was such an awesome project. This was probably the servers best kept secret
Hub - June 2011 - Our hub world, the jumping off point to the rest of the worlds. The central building is still a well known icon for the server.
PvP2 - Never Released - the PvP map that was built over many months and never released, we scrapped PvP before releasing.
Fyra - April 2011 - Fyra means 4 in swedish, since this was our 4th world, but it wasn't "version 4" which was never completed (yet)
Borjan - Dec 2011 - Borjan means beginning in swedish, it was a hope that this would be a new beginning
Tolteca - Oct 2012 - Our next world in the survival server series
TNA - Jun 2015 - Our previous world in the survival server series
Creative - Jun 2015 - The infamous creative world, it dates back to the old Version 3 / Survival named servers.