There is another thread about the A321 http://www.flyertalk.com/forum/showthread.php?t=691240. You will not know for sure which config you will get until perhaps hours before the flight. However, this is a great description of the new A321 config: http://www.flyertalk.com/forum/showp...3&postcount=20

If you get an old A321, the exit rows are 8 and 21. Row 21, especially the DEF side, has awesome legroom.