Hi Roland, I am not using spass directly but it is a suggestion of one the packages I maintain (why3), and in fact I am glad to have spass in debian as it is quite good at reasoning about quantified formulas, in contrast to most SMT solvers.
So, I would be interested in helping out maintaining the spass package. I think it would fit well into debian-science, so as a first step I would suggest to check it into the debian-science git repo. Cheers -Ralf.