PLCC is lightyears more difficult than DIP until you get the right equipment. Luckily it's all very cheap and not very specialized either. Kenneth Maxon at Seattle Robotics did on this method, and it seems to be getting very popular.
I've heard though, that DIPs have better temperature durability than you might expect. Plus you get to work with IC sockets if there's any chance you need to replace or reprogram anything. Cadsoft's EAGLE program has some good board footprints for DIP, SOIC, and PLCC devices.