I figured now would be a good time to post the final 4.0 changelog, since it's almost done:
-AI will cloak to pillage, use ranged units, and heal
-Merged in Final Frontier Plus mod platform version
-No more hardcoding in the SDK
-Merged in Inhabited Planets from Final Frontier Plus
-Removed bAlwaysKeep (no longer needed - use iConquestProb instead)
-Removed bOnlyOne (replaced by bOnePerSystem)
-Starting gold is now applied in Civ4EraInfos.xml, not python
-The AI will build sensor posts
-The Vaadwaur start in the current era (no longer hardcoded to Enterprise)
-Added bUpgradeDiscount tag to Civ4BuildingInfos (for Alliance unique wonder)
-The code for animals always razing cities has been moved to the SDK
-Alien Vessel: 2 strength
-No more extra BuildingClass entries
-Fixed issue with unique wonders that used python
-The Borg no longer research normally but acquire techs on city conquest
-Merged in remainder of Wormholes python code
-Optomized code in CvFinalFrontierEvents:
nPlotRevealed
-Enabled modular XML loading
-Merged in Wormholes XML and map scripts
-Updated all older scenarios
-Deep Space Nine: Fixed bug in diplo system
-Deep Space Nine: Adjusted tile visability
-Deep Space Nine: Adjusted Dominion exploratory force and fixed python exception
-Deep Space Nine: No culture due to problem with Dominion unit spawn
-Deep Space Nine: Fixed conditional event bugs
-Xindi Attack: Events are now stored across save games
-Xindi Attack: Optimized "Find Enterprise" code
-Disabled global warming
-Some AI updates
-Changed war diplo music
-Nemesis 30 second music clips no longer used in era music
-ST Enterprise: Starbases require Starbase instead of Shields
-ST Enterprise: Earth starts with Daedalus units, not barbarian ones
-ST Enterprise: Daedalus: 2 strength, 1 move, 75 cost, no tech prereq, +50% vs. Romulan Bird of Prey
-ST Enterprise: NX Class: 120 cost, +20% vs. Romulan Bird of Prey
-ST Enterprise: Romulan Bird of Prey: 10 strength, starts with Assimilator
-ST Enterprise: Added Daedalus Refit: Requires Improved Dilithium Shielding, 4 strength, 75 cost, 2 moves, +50% vs. Romulan Bird of Prey
-ST Enterprise: Added new maps in epic game option
-ST Enterprise: Fixed issue with Duras image
-Removed 22nd Century epic game option (no longer needed and difficult to support)
-Borg ships immune to collateral damage from heavy ships (to prevent Scimitar exploit)
-Added random events
-The Galaxy: removed probes
-The Galaxy: founded values at start
-The Galaxy: added inhabited planets
-The Galaxy: increased team member modifier to research rate
-The Galaxy: removed alpha quadrant only option (no longer needed)
-Added new scenarios: The Maquis Rebellion and three from the Mirror Universe