[Lilux-info] Groupware Products? Who can provide details-infos?

Hye, I'm would like to install a Groupware Software on a Suse Linux 9.3. Server, which should provide the following features: * Central saves of all important data for a 2 person office, for example: Common calendar data, emails, notes, contacts, files, todo-list, ... * Data should be accessed over browser also, from any PC connected on the Internet. * Exchange possibilities (I know, for 2 persons, its perhaps not worth the efforts!) whould be fine, for example with 1 WinXP Workstation with Outlook, 1 Linux-PC running Suse Linux (or Ubuntu-Linux) with Evolution, 1 possible exchange connection with PalmOS (on PalmOne Treo 650). I know that some software (loke OpenXchange) provide Connectors for these issues. Could anyone give me a good tip how to solve this problem without great installation difficulties? Does anyone have experience with Groupware or Exchange Software or are there other possibilities? Thanks in advance, Greetings, -- Yves Schintgen <sevy(a)vo.lu>