I am also a big fan of AA. My fav level is definitely Insurgent_Camp, followed by HQraid, then Pipeline. Sniper training was a bit brief and uninteresting, but at least now you can be a sniper in Insurgent_Camp. I think the netcode is awesome; the only time I seem to lag is when I walk in tight indoor places... don't know why. It also helps having the WEST Official servers a couple miles away. Sub-100 ping all the time... I'm loving it.
AA is an online only game, except for the training missions, which are dull anyway. I don't think they have bots planned for the final version either. But they do have LAN support planned. Use the NVIDIA site to get the game.