I just took at look at your demo and I think it's a really cool idea, and you have a clean, attractive UI. It seems pretty different from Blippy or Swipely though actually - more focused on products rather than an individual's transactions.
Go for it and just launch! I would love to use it.
Not a form of AC necessarily but I know Chinese people put straw woven mats on chairs and on the floor to sit/sleep on when there's a lack of AC to help keep cool
My roommate works for two sigma and he actually likes it a lot. He has a CS degree from CMU and used to work for GS, and like its much more than GS.
I don't think he works in the deep level programming group but rather product development, but he says he finds it stimulating and interesting - and is paid very decently for the level he is at. In fact, he won't leave the security of the job and pay for any startup no matter how I try to convince him ;).
He has also stated that the people who work there come from a diverse range of backgrounds and it's just a very chill and laid back environment unlike most finance shops.