I've been looking into the spray example. But the spray example is much more than only the xtext generation. It is immediately an advanced example.
I would prefer to see a "Hello world" maven example. Preferably generated as part of the myDsl example. Or as a tutorial on the xtext site, or as a maven xtext sample archetype. So you could create a new maven xtext project layout by using mvn archetype:generate.
I was not yet able to apply the spray example on my own project, I got distracted by all the different spray modules.
There are some blog items available for the previous xtext version, but there is not much for xtext 2.0.
I think for a lot of people it is a requirement to be able to build your own xtext project with maven and have it run on a continuus integration servers.
Spray is the best example, it includes Jenkins builds on CloudBees: https://spray.ci.cloudbees.com/job/spray-ci-build/92/
This is an old thread, but 1 year on I found the examples and general explanation to be lacking. Here is what I found and the simplest maven example for XText 2.2 and 2.3: github.com/aphethean/xtext-maven-examples
I had similar problems trying to find documentation on using maven/tycho with xtext. I wrote up experience as a step-by-step 'howto' and never quite got round to publishing. I've put it up here: presentation isn't great but might be of some use. Warning: it's very prescriptive and so quite long.
I'm still very much a tycho/maven novice so any feedback appreciated.