On my system, they are in C:\Program Files (x86)\WampServer\bin\mysql\mysql5.1.53\data. So in yours they would be in E:\wamp\bin\mysql\mysql-version\data.
You can start mysql locally from E:\wamp\bin\mysql\mysql-version\bin, where all the executables are. Be aware that the configuration file you want to use is E:\wamp\bin\mysql\mysql-version\my.ini.
You can also simply copy all the subdirectories to another server. I’m no MySql expert, but that should let the other server use your databases without problem.