After the shortage of Leica lenses before the price increase, the shipment of M glass has definitely improved over the past few weeks. I just noticed today that my local dealer even has the new 35mm Summilux in stock plus the 21mm/1.4 (B stock), 24mm/3.8, 90mm/2.5 lenses (no online ordering, call them at 561 253-2606).
DalePhoto has 18/3.8, 28/2.0, 28mm/2.8, 35mm f/2.5, 35mm/2.0 black, 50mm/2.5 lenses in stock, Adorama has the 50mm/2.5, 35mm/2.0 silver and 75mm/2.5. Check also the current inventory at Popflash.