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We report the first observation of azimuthal beam-spin asymmetries in hardelectroproduction of real photons off nuclei. Attributed to the interferencebetween the Bethe-Heitler process and the deeply-virtual Compton scatteringprocess, the asymmetry gives access to the latter at the amplitude level. Thisprocess appears to be the theoretically cleanest way to access generalizedparton distributions. The data presented here have been accumulated by theHERMES experiment at DESY, scattering the HERA 27.6 GeV positron beam offdeuterium and neon gas targets.Comment: 5 pages, 6 figures. Talk given by F. Ellinghaus at the "15th  International Spin Physics Symposium", SPIN 2002, September 9-14, 2002, BNL,  Upton, NY, USA. To be published in the proceeding

Deeply-Virtual Compton Scattering on Deuterium and Neon at HERMES