The battle between IBM's and Microsoft's collaboration platforms is starting to crackle again with IBM's announcement that it will <A HREF="http://searchdomino.techtarget.com/originalContent/0,289142,sid4_gci1059841,00.html">invest $100 million to expand Linux support</A> and technology across its Workplace software portfolio. IBM will spend the money over three years and will focus broadly on research and development, ISV support programs, channel and partner promotions, various technologies and integration centers, among some of the areas. Platforms included are WebSphere Portal, Lotus Notes/Domino and IBM Workplace.