[JesseK]

private List<Team> mTeamList = new ArrayList<Team>();
private final static int sNUM_DIVISIONS = 4;
private static Timer t = new Timer("Randomizer");
private static TimerTask divTask = new TimerTask(){
    Integer division = -1;

    @Override
    public void run(){
       synchronized(division){
           division = (int)(new Random(System.nanoTime()).nextDouble() * sNUM_DIVISIONS);  
           //Indexes the divisions from 0 to 3, which would match the ordinals of division enums
       }
    }

    public int getDivision(){
       synchronized(division){
           return division;
       }
    }
}

static{
   initTeamList();  // Populates the team list with teams who are attending Atlanta
   t.schedule(divTask, 0, Math.random()*1000);
   Iterator<Team> it = mTeamList.iterator();
   Timer teamDivTimer = new Timer("Division Assignment");
   TimerTask teamTT = new TimerTask(){
       public void run(){
          if(it.hasNext())
             it.next().setDivision(divTask.getDivision();
          else
             cancel();
       }
   }
   teamDivTimer.schedule(teamTT, 0, Math.random()*1000);
}

Run it, the select random teams to even out the number of teams in each division. 'nuff said