Yes I know Adorama and have used them for prints several times in the past but haven't been quite happy - my own prints always look nicer but don't have the ability to print large panoramas - about 18 x 60 or so.
Is it just for personal display - or for commercial use? You could use a high end (expensive!) place like Duggal http://www.duggal.com/solutions/photographic-printing-services/ or something cheaper like http://ezprints.com/prints-and-panos/panoramas.html