The goal of the SIMBA collaboration is to provide a global fit to the
available measurements of inclusive B -> X_s gamma and B -> X_u l nu decays. By
performing a global fit one is able to simultaneously determine the relevant
normalizations, i.e. the total B -> X_s gamma rate and the CKM-matrix element
|Vub|, together with the required hadronic parameters, most importantly the
b-quark mass and the b-quark distribution function in the B-meson, called the
shape function. In this talk, the current status on the model-independent
determination of the shape function and |C7^\incl Vtb Vts*|, which parametrizes
the total B -> Xs gamma rate, from a global fit to the available B -> X_s gamma
measurements from Babar and Belle is presented. In particular, the theoretical
uncertainties originating from variations of the different factorization scales
are evaluated.Comment: Proceedings of CKM 2012, the 7th International Workshop on the CKM
Unitarity Triangle, University of Cincinnati, USA, 28 September - 2 October
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