Although useful and increasingly put into regular use, current collaborative working environments (CWEs) have several limitations and relevant needs for further research. Most systems address either traditional and rigid intra-organizational collaboration scenarios or, at the opposite, completely free and unstructured open communities' interactions. Emerging dynamic, more flexible and ad-hoc collaboration schemes are hardly or not supported at all. Aiming at getting collaborative working environments free from rigid constraints, POPEYE will consider P2P over wireless ad hoc groups, where fixed infrastructure is not a prerequisite, where virtual communities can emerge spontaneously and share data with the appropriate quality of service for business applications (persistence, synchronisation, security,. ..).