Zokissama, Im pretty sure it has something to do with the war in Iraq. Sad as it is war inspires people to build things because all off a sudden these machines are becoming common place on TV. People who normaly build these things used to have to do alot of research on thier subject matter and that can sometimes discourage a builder (sometimes, yes I know there are those of us who actually enjoy the research part - myself included) But now one has but to turn to CNN to see a Bradley, Abrams, or HMMWVE rolling through Iraq and alot of people want to build these awsome weapons of war.
Model Companies know this and even they have jumped on the Band Wagon to make the extra buck releasing kits specific to OIF and OEF.