Just in case anyone is looking for some more information about the USAA Career Starter loan, I put up a blog post about:
Is the USAA Career Starter Loan a Good Deal?
Also, here's how I used my USAA cadet loan. Basically, I took $15k, invested in 50% large cap, 25% small cap, and 25% international mutual funds. The other $10k I put into 1, 2, 3, 4, 5 year CDs at $2000 to create a CD ladder.
After letting the $15k grow for 1.5 years, I sold it, and paid off another student loan I had at 6.8% (my USAA loan is at 2.99%). I've got about $10,000 left to pay off on on the USAA loan. The CD ladder I've just let mature and become my emergency fund.