We have options and from what I've seen before, Rudy T likes options. My conclusion is that he will experiment a little.
Unlike the majority of posters, I don't pay very much attention to who's starting. What counts is two things. 1) Who's in the game in the final minutes? & 2) Which mismatches is RT trying to create or take advantage of? In other words, you may not use the same combination against Shaq, Samake Walker and Fox that you would against Rasho Nesterovic, Joe Smith, and Garnett and those lineups may both differ from Gasol, Gooden and Battier.
after last season, i think that rudy will enjoy some consistancy from his starting 5. if he finds one that wins...look for them to start the rest of the way.
If Rice has trouble staying healthy this year, I could see some different combos of Mo/Kenny/Griff. Other than that I think we'll be pretty consistent.
as far as who's starting, we can all only say for sure mobley and francis in the backcourt. everything else is just about up for grabs at this point. imo, opening day it could be steve, mobley, kt, eddie, cato. i agree with gater though. it won't really matter who starts but who plays the critical minutes and it looks like we have a team flexible to change depending on the matchups.