Harden solid in Chicago debut - will he put Cubs over the top?

I happened to be in attendance at Wrigley for Rich Harden's Chicago Cubs' debut on Saturday and he was awfully impressive. He only lasted 5.1 innings, but he gave up just five hits and no earned runs while also striking out 10 in the Cubs' 8-7 extra innings victory. Of course the Giants aren't a good team to base whether or not Harden will be effective for the Cubs throughout the rest of the season (especially when their starting lineup consists of Rich Aurilia, Eugenio Velez, Omar Vizquel and Jose Castillo), but 10 Ks in just 5.1 innings is outstanding ? no matter how bad the opposing offense is. This Harden deal might be the one that officially puts the Cubs over the top. Harden and Carlos Zambrano are a solid 1-2 punch at the top of the rotation and Ryan Dempster has been lights out at home. Their lineup is stacked when Alfonso Soriano is healthy, and they're getting great production from role players like Mark DeRosa and Mike Fontenot. Is this finally the Cub...