The army warrant program is THE way to get your rotary license. Originally I was pursuing an active commission to fly helos but after going to the Quad a convention this may with my Quad A chapter at school (VMI one of the 2 schools that have a chapter in the entire country) I found out this is the only way to do it. I also found out that you may be able to get a fixed wing license through the army and that if you want to go fly commercial fixed wing after you get out the rotary hours are converted on either a 2:1 or 3:1 ratio. Not bad eh?
I took the AFAST in April and passed with ease. The test is no joke though, they threw in a lot of technical stuff I wouldn't have known without the review book (the one that contained all off the DOD flight test reviews). Read all of the info there, not just for the AFAST but for the other services, it helped me retain all of the info.
I also learned at the convention talking to a lot of the defense contractors that they had previously been pilots and the market is looking for ex army pilots as consultants or to work on projects ( a lot on the Comanche project).
I just have to take my flight physical and complete my packet to get in the program. You need 60 college hours or be prior enlisted, or both. The more points in your favor the better.
Since you have no prior military background and are not currently in, you are only eligible for I belive 3 warrants. If you are not accepted for 153A, then I believe you have no military obligation (you haven't completed any training, how can you owe them anything?)
The convention showed me the light, partly due to the head of our chapter, General Mike Bissell (the second most decorated army aviator) got us a lot of private meetings with people such as Gen Bryan Brown (commander of USSOCOM), the commander of the 160th SOAR and 2 other pilots from the unit, members of the Comanche project, and a slew of other aviators, generals and big shots in army aviation.
Good luck and remember, it is the best program out there