I have been thinking about this for a while now. It would be great to have a map that would combine the different styles we can find here in the Guild. Some sort of repository that would contain different styles and techniques to create maps. This would help new members to get a better idea of what they like and how to do it but would also help older members. And it will make a great map too!
For example the map could include V-inversed shaped mountains, Ascension's Atlas Style mountains, Mountains ridge like Lingon does them (for example), etc. It might seems similar to the CWBP but the goal and the final rendering should be completely different. It's not about depicting a coherent world since the practical aspect should be more important.