Strange I should come across this thread this morning!
I had a visitor to my studio last night (digi wedding pro) and we were discussing the "world size" prints. This discourse then moved to thinking about having a print 2.40m tall (floor to ceiling) made, wide-sweep flood lip to replace two present prints on the gallery wall. The tranny would come from 6x7, drum-scanned and printed per usual digi work by my pro lab has done very large mural sizes for Government and wedding clients. Next week a discussion will be held about the cost, but he assures me it is not prohibitive. We'll see!