No biggie. The Cubs have the same problems as the Astros. They have Zambrano, an chronically injured Prior, sophomore Rich Hill and kids/scrubs on the mound. They just vastly overpayed for a career year from a utilty infielder and for a all-star slugger who wants to bat leadoff and has rarely played CF.
Don't believe the hype. If the Astros can get a few of their own or other pitchers signed, and figure out what to do with the 3B situation, there's a great chance that they'll be better the Cubs.
Granted the Cubs have a slightly better bullpen, but that's quibbling. Games are won and lost starting in the spring, not in November.