Air Scandic have been leasing aircraft from all over the place to cover their holes in scheduling. Air Scotland, Air Slovakia & Air Finland have all leased 757-200s which have been coming through NEMA the last couple of weeks.
From the rumour that has been doing the rounds at NEMA today, they're operating a nine aircraft summer schedule with about seven aircraft. I'm not sure if that's true, but there's certainly been a long delay. Talking to a couple of people at Servisair & the airport authority and it seems that it's quite an event if a Scandic flights leaves ontime.