You actually paid for it months ago...
Don't think I've ever heard of those maps before, but that first screenshot reminds me of Karkand.
They are Bad Company 1 maps so if you are a PC only player these will be new to you.
Good thing about Oasis and Harvest Day is that they have very good town/built up areas at some point in the map, a bit like Karkand, some thing I feel has been missing from the bc2 maps up to now.