We should start a petition against the half pin spacing. I've just seen a tutorial somewhere on how to make your own arduino shield.. starting with drillingin-between holes on perf-board :-?
Not to steal the thread, but is this really something people would like? A Diecimila clone with the second digital header on 0.100" centers? Seems to me like this should be an easy enough modification to any of the Freeduino clones. If, lets say, 8 people PM me and express their interest, I'll make one.