Aviators seems a Plus
I have not traveled on TWA in years, but I got an offer from Radisson Hotels to join, and get 5,000 miles to start -- just for joining.
I have not joined because TWA flies too many DC-9s, but I might in the future. Their website has a lot of good information, and the Aviators program offers 1 mile for every $1 on a full-fare ticket, so that adds a few thousand miles each month.
I will keep my eye on TWA. It seems they are doing a lot of good things, but for now, I prefer a larger aircraft, and better connections on the east coast.
John