In reply to gunilla: The only option that really springs to mind is to head out to Yosemite in California and do a guided ascent of a a proper, but reasonable straightforward big-wall (grade V) route like the West Face of Leaning Buttress -
http://www.supertopo.com/rock-climbing/Yosemite-Valley-Leaning-Tower-West-F...
You will have no problem getting an American mountain guide to take you up anything in Yosemite. For example see
http://www.yosemitepark.com/rock-climbing-guides.aspx
In Europe there are pretty much no easier routes where using a Portaledge would be anything other than extremely contrived. All the routes where they would be used are generally too hard or too dangerous for a guided ascent to really be an option.