I added the latest version of the editor for download so you can play around with it a little :)
Main improvements:
- Added new exit type: stairways
- Improved display of maps
- Added variables to the event editor
- Reworked handling of color palettes
- Added palette editor
You can download the editor here (I also added the link to the "Downloads" section):
GaiaTheCreator v.0.4.1
EDIT:
Due to problems I added a new version v.0.4.2:
GaiaTheCreator v.0.4.2