Welcome to Smogon! Take a moment to read the Introduction to Smogon for a run-down on everything Smogon, and make sure you take some time to read the global rules.
In response to your question: yes, PokeLab is down for the time being. Cathy (the head programmer behind PokeLab) has quit Smogon, meaning we are no longer affiliated with Pokemon Lab. A Smogon server on Pokemon Online is in progress, however.