X0202 3/A 2005-03-31 2005-04-05 0 0000754813 ION NETWORKS INC IONN 0001044321 MARXE AUSTIN W & GREENHOUSE DAVID M 153 E 53RD ST 55TH FL NEW YORK NY 10022 0 0 1 0 Common Stock 3080847 I By Limited Partnerships Warrants 0.23 2005-03-31 2010-03-31 Common Stock 1058824 I By Limited Partnerships Warrants 1.25 2002-02-14 2007-02-14 Common Stock 533400 I By Limited Partnerships This is a joint filing by Austin W. Marxe (Marxe) and David M. Greenhouse (Greenhouse). They share voting and investment control over all securities owned by Special Situations Cayman Fund, L.P. (Cayman), Special Situations Private Equity Fund, LP (PE), Special Situations Technology Fund, L.P. (Tech) and Special Situations Technology II, L.P. (Tech II), respectively. 1,198,747 shares of Common Stock and 604,324 Wts are held by Cayman, 1,281,653 shares of Common Stock and 666,476 Wts are held by PE, 94,621 shares of Common Stock and 50,780 Wts are held by Tech and 505,826 shares of Common Stock and 270,644 are held by Tech II. The interest of Marxe and Greenhouse in the shares of Common Stock owned by Cayman, PE, Tech, and Tech II is limited to the extent of his pecuniary interest. Subject to completion of form S-3. Upon completion of the Form S-3 filed in March 2002. Austin W. Marxe 2005-07-28 David M. Greenhouse 2005-07-28