I must pipe-in for Jana, since she is from our home gym! =) If you look at her scores, she does have a fairly decent level of difficluty in her start values. I'm no expert, but maybe if she can really hit her routines, and be a bit more crisp w/ her moves, she could end up helping the team a lot. She's a very sweet, calm and focused young lady. I doubt she'll get very 'rattled' and lose her nerve, which is a very valuable trait in a gymnast!
I also really like Ivana Hong. We saw her live when we went to the VISA champs last year in San Jose, CA. She looks very pretty and 'light' in her routines, but she does seem to sometimes get nervous and wobble. Since we watched warm-ups and competition, we did notice that she made a few more mistakes while competing than she did in her warm-up.
Definitely Alicia. Just for her leadership and spunk alone, she's an incredibly valuable team member. Her college experience has most-lilkely taught her that 'team' mentality, which is so important in the Olympic race for Gold!