I'm not normally used to needing banners (not on corporate, but I might end up needing to move to it later), but a vertical one would definetly make it easier for me to incorporate (there's a header, then a leftbar, center, and rightbar, then the footer. The rightbar has like 3 pictures cause I couldn't think of anything else to put there, but a vertical banner would fit perfectly)), but I'm always for an option (provided of course that that option doesn't somehow destroy the hosting we know and love...)