i shoot video for a company at figure skating events, and there is always a photog at the same events to sell photos.

from what i gather, all he uses is his main computer to dump cards, a router to connect all the computers, and then have iPhoto setup to browse images on the client computers.  seems easy enough the way i see them do it.

what about alternative of exporting lightroom web galleries? i'd wonder if the exporting time / gallery build in lightroom would drag you down time-wise though.. 

good luck. let me know if either of those ideas work out for you.