I have placed in the arXiv the following two preprints that correspond to a part of my CT08 talk: • Groupoid actions as quantale modules, 14 pp.; http://arxiv.org/abs/arXiv:0807.3859 . • Groupoid sheaves as Hilbert modules, 27 pp.; http://arxiv.org/abs/arXiv:0807.4848 . Best, Pedro