As of April 20, 2010, USCIS is reporting that there are about 20,000 filled. Therefore there are about remaing 46000 H1B quota are left to be filled. It is expected to take about 3-6 months to fill up the remaining quota. If intereted in purusing H1B Visa or change of status to H1B,  it is a good idea to start planing as soon as you can.