Whoops, I must have pulled my post as you were putting yours up! The true and effective top tube measurements were flipped on the Surly site, and that confused me, and I thought the bike would be way too long, and then I pulled the post and then I realized that no, I had it right the first time and disaster all around with great wailing and gnashing of teeth....
But anyway, here's the link again: http://surlybikes.com/bikes/pacer_complete/
I'm such an airhead... 
Call the shop before you go, to see if they have the 42cm in stock. Even if they only have other Surlies in stock at 42cm, try them anyway. More bikes, more fun!
The extra brake levers up on the flat part of the bar that you saw are interruptor levers. They are popular on cyclocross bikes. They are fairly cheap, and can be added to a bike if you find one you like.
Last edited by KnottedYet; 07-25-2010 at 10:32 AM.
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