According to Gordon Wittenmyer, Lou is moving Alfonso Soriano out of the leadoff spot for the time being and putting Ryan Theriot up there. It looks like Theriot, Fukudome, Soriano, Ramirez, Lee in the first five spots for tonight. It'll probably be some combination of Reed Johnson, Soto and either Fontenot or Miles for the last three spots.
With Soriano now in the middle of the order, the Cubs should be good for what? 7...10...15 runs a night? Sarcasm aside, Theriot and Fukudome are doing the job right now getting on-base and with Bradley out and Hoffpauir likely not playing too much more corner outfield, the middle of the order could use the power for the time being. I would guess that this won't last long enough to get any meaningful read on whether the team is better off with Soriano batting leadoff or in a more traditional run-producing spot, but it definitely won't hurt the team as long as Theriot and Fukudome keep getting on-base (there's some expert analysis for you). The best thing about all this is moving Lee down the fifth spot in my opinion.
Full Lineups for Tonight: Theriot, Fukudome, Soriano, Ramirez, Lee, Fontenot, Soto, Johnson, Dempster vs. Shumaker, Ankiel, Pujols, Ludwick, Duncan, Molina, Greene, Thurston and Wainwright.