TSM,
At the moment a score of 125 on the aptitude is considered competitive. To clarify, anyone scoring less than 125 is told not to expect any further progression, an uncharacteristicly kind way of saying their application is 99% likely to be terminated.
However, I'd hazard that any less than 130-135 probably doesn't set you up very well.
As with all things RAF it all depends. Lets say you scored 126 aptitude, but filter was brilliant and you got on well at OASC. You would probably do better than someone who scored 155 aptitude but who had the social skills of a dead salmon.
It all depends, and there is absolutely no point in trying to second guess what's going on or what your chances are mate, a lot of us are in the same (possibly sinking, or built and then just kept as a £3bn paperweight) boat.
Sit tight and wait it out would be my advice.
Edit: Further advice would be to not expect any physical movement until 2012.