The copy I bought from Amazon earlier in the week for $29.99 included the Nuketown Map but that is YMMV. What isn't YMMV is that you'll get your item from Amazon much sooner and apparently for $5 cheaper.
Groupon has had some good video game deals but it takes at least 10 days for me to get my items. They always end up using a crappy DHL-USPS hybrid which takes forever.