First edit your Maven settings.xml file to add Mycila snapshot repository to get latest Soecket.IO-Java libraries. You'll find all necessary information at Mycila Repository wiki.
Then get the samples and build them:
git clone git://github.com/Ovea/conf-reverse-ajax.git
cd conf-reverse-ajax
mvn clean install
Now you can open your IDE and run in each module the *Sample main class in src/test/java of each module to start the sample you want.