Since I wanted to be on the first allocation of BRZs, I put my money down before March 1st and I became first in line at my dealer for a BRZ. On the morning of March 1st, my order was put in first, and I'll have the first allocation
(Was that enough 'firsts' ?).
If you don't care to be among the first buyers, then it's okay to wait. Especially since the rumor is that the FR-S will be produced in greater numbers, and therefore be more available.