A summary of warrants outstanding as of December 31, 2001 is as follows:
                                                  EXERCISE PRICE     NUMBER            EXPIRATION DATE                         PER SHARE     OF SHARES           ------------------------------------  ---------------  ----------             08/07/2002 . . . . . . . . . . . .  $          1.20     697,500             01/03/2004 . . . . . . . . . . . .            0.625     800,000             03/07/2004 . . . . . . . . . . . .             4.50     300,000             04/17/2003 . . . . . . . . . . . .             5.00     220,000             04/30/2003 . . . . . . . . . . . .             5.00      80,000             05/05/2003 . . . . . . . . . . . .             5.00      20,000             05/18/2003 . . . . . . . . . . . .             5.00      15,000             05/22/2003 . . . . . . . . . . . .             5.00      25,000             06/04/2003 . . . . . . . . . . . .             5.00     200,000             06/05/2003 . . . . . . . . . . . .             5.00     170,000             06/08/2003 . . . . . . . . . . . .             5.00      50,000             05/22/2003 . . . . . . . . . . . .             1.25     100,000             05/22/2003 . . . . . . . . . . . .             1.50     100,000             07/23/2008 . . . . . . . . . . . .            0.625   3,165,396             04/10/2008 . . . . . . . . . . . .             1.25   2,750,000             04/23/2004 . . . . . . . . . . . .             0.75     288,936             04/27/2004 . . . . . . . . . . . .             5.00     163,302             05/03/2004 . . . . . . . . . . . .             5.00      18,130             05/12/2004 . . . . . . . . . . . .             1.25     420,000             05/12/2004 . . . . . . . . . . . .             1.25     700,000             03/09/2005 . . . . . . . . . . . .             1.25     450,000             04/17/2007 . . . . . . . . . . . .             0.75   2,000,000             04/25/2005 . . . . . . . . . . . .             0.75     202,500             04/25/2005 . . . . . . . . . . . .            0.625   2,500,000             05/04/2005 . . . . . . . . . . . .            0.625   2,500,000             05/04/2005 . . . . . . . . . . . .             0.75     924,939             06/04/2005 . . . . . . . . . . . .             0.75     950,711             06/27/2005 . . . . . . . . . . . .             0.75     975,000             06/30/2005 . . . . . . . . . . . .             0.75   1,500,000             06/30/2005 . . . . . . . . . . . .            0.625   3,000,000             07/07/2005 . . . . . . . . . . . .             0.75      33,333             08/24/2005 . . . . . . . . . . . .             0.75     450,000             09/07/2005 . . . . . . . . . . . .             0.75      41,700             12/28/2005 . . . . . . . . . . . .            0.625     729,985             07/23/2008 . . . . . . . . . . . .            0.625   8,800,000             10/31/2006 . . . . . . . . . . . .             0.75      75,000             04/25/2005 . . . . . . . . . . . .             0.75      55,000                                                                  ----------                                                                  35,471,000                                                                  ==========  |