I doubt Hillary, and she is the presumptive D nominee at this point IMO, takes another legislator. I also doubt that an all female ticket is in the works. My guesses for her include: Gov. Henry, OK; Gov. Manchin, WVa; and Gov. Kaine, VA. However, if I had to pick one person that I think HRC would really want I'd go with Gov. Culver of Iowa.
The R side is just to much a jumble for me to make an educated guess at this point, but I'll try some quick match-ups for fun.
1. Giuliani - VP Donald Trump (joke) no clue really
2. Romney - VP Gov. Perry, TX
3. McCain - VP Colin Powell