We will be updating the server to 1.8 this weekend. The reason for this instead of now is to help get a more stable version and for plugins to update by that time so there will be no issues or downtime. The world will be expanded with a new worldborder of 25k. This will create any new chunks or biomes that players want to find.
Edit: The update to 1.8 has been pushed back 1 week.
- Dave & Emma