PalmSource looks to have the open-source community in its corner as it comes out swinging at established contenders for a share of the growing mobile handset market. But analysts were unclear on how <A HREF="http://www.eweek.com/article2/0,1759,1737802,00.asp">PalmSource's Linux move</A> will shake out for the operating system and for its customers, including sibling palmOne Inc.