If you're planning on deploying new handheld devices at the start of the New Year, and portables with the BlackBerry 4.1, Palm 5.4, Symbian 9.2 and Windows Mobile 5 operating systems are on the potential purchase list, you might want to check out this handy in-depth review of the devices and how they stack up against each other. The review includes a look at third-party applications, as well as which system does the best job in helping users keep track of appointments, contacts and other communications information. Guide [1]