OK, so I am not someone who travels for business and when I fly for leisure, I usually try to stick to the same airline/alliance to get points accumulated quicker.

For some long-forgotten reason, my choice became NWA and just a few weeks ago I finally crossed the 25,000 miles plateau (I know, peanuts for all of you guys, but, once again, I don't fly that much). I used to live in Nashville but moved to New York this summer, and between this past July and this upcoming x-mass, I have/will take three flights. Two to Nashville, one to the UK. All on Delta, since JFK is the hub.

Considering that NYC is a hub for both Delta and Continental, it's kind of easy to keep earning WorldPerks, though I do feel like I'm missing out on getting skymiles and bonuses from Delta, considering I fly with them more. My question is, should I keep accumulating miles on NWA (I'll probably have slightly over 30,000 miles by the end of the year. Maybe around 35,000)? Or should I, after this year is over, switch to another program? I am most interested in earning some miles to eventually get a free flight to Australia, though I don't think Skyteam is the best alliance for that trip. I also have family in Russia, and I do fly there once a year or so on Aeroflot or Delta, so I could keep earning the miles.

I do have a FF account with AA and United, but I don't have more than 4,000 miles in each. I'm not interested in opening a credit card from Chase to boost my miles level to 25000 with United (I know, sad). What would you all recommend? Stay with NWA and keep earning and getting enough pts for an international awards ticket and somehow routing it all to get to Australia or switch and focus on flying only on United or AA?

Thank ya