The extra would be beneficial to both teams, maybe slightly moreso to the Cardinals. It would give all the pitchers another day of rest, and would set up Chris Carpenter to make another start in Game 7 on full rest. It would also give Derek Holland another chance after his shut out, though I'm less confident in his ability to replicate that performance than I am in "Darth Carp."
For me, a rain out tonight would be terrible. I do think the Cardinals will win this first game in St. Louis regardless of when it's played. If there's a rainout, that means Game 7 would be played on Friday, and that just wouldn't work for me. I'm heading to Minnesota straight from work to play at Hallowinona (an ultimate disc tournament). It's a seven or eight hour drive, which means there's no way I'll make it to the hotel to watch the game. This happened in 2006 when the Cardinals won the World Series, and it was a bit unsatisfying, so I'm really hoping they get Game 7 in on Thursday.
As far as disc is concerned, I'm in terrible shape and I haven't thrown a lick, so it will likely be embarrassing for me. The only thing I can hope is, being an alumni team, a lot of the other guys will also be out of shape so it won't look so bad on me. I'm sure there will pictures posted here of my costume, though, so you can have that to look forward to.