ATM is still used in a lot of carrier environments.... The Bells like to use it on their systems. ISDN is still hobbleing along unfortunately. About 5 months ago or so we moved a customer off of ISDN onto our network (wireless). I was surprized that in 2007, they were suffering wtih BRI ISDN.... Someone needs to just finish ISDN off and kick its wooden pegleg out from underneath it.....
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You can check the current Written and Lab Blueprints on the Cisco Routing and Switching CCIE page
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SCD
Also ISDN is still used alot in older fire alarm systems and
alot of legacy remote hardware management systems.