Im currently developing a chrome plugin. (it will be released official shortly, today its in a public beta stage in the Swedish community).
I feel that its strange that there are no official policy and rules, and my feeling when communicating with waze officials is that there is no official rules as long as u don't use non allowed third party information...
But with the post from waze at 2012-11-15, http://www.waze.com/blog/community-buil ... p-editing/
i felt that waze encouraged this kind of contributions.
What i would like to see is,
a clear official policy with rules. (what is allowed, what isent, how to deploy...)
a basic set of functions (a plugin should control the WME version and only load if its a tested version)
a forum part where plugins can be found. (so all can find them easy, and developers can share and help each other, and maybe get some answers from Waze dev)