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As a highly correlated process, simultaneous electron-impact ionization — excitation presents a major challenge to experimentalists and theorists alike. With the rapid advance of computational power, it has recently become possible to account for both first-order and second-order effects in the interaction of a "fast" projectile with the target, combined with a convergent close-coupling-type description of the initial bound state and the interaction between a "slow" ejected electron and the residual ion. Examples of our recent work on this problem are presented, with particular emphasis on the role of auto-ionizing resonances in ionization-excitation of helium, as well as preliminary results for the more complex calcium target. [ABSTRACT FROM AUTHOR]