The proliferation of social networking tools brings new challenges to make visible and effective library services in the virtual fields. One difficulty stems from not less than the multiplicity of existing channels, its volatility and constant renewal, which may demand a volume of exertion for the real capacity of the library and end returns it can get. Our experience is going through the selection of tools to use in terms of the stability, popularity and friendliness (Web, Facebook, Twitter, Netvibes ...), and interconnection of all or any of its elements, so that the maintenance Information and services offered by these channels does not distract our human resources from other tasks that are still badly needed
