Title.
about 100,000 of these should do it in the interim period
http://www.bteex.com/Google infrastructure is good
lets do it, cut out the bit exchanges problem solved
EDIT 1
Seriously a few good coders and there are api's google .gs scripts, javascript available and all sorts of integration, we can get something together, and en-mass clone it...local exchanges everywhere...and by local I mean in your street.
EDIT 2 design philosophy,
Ok a few layers are needed
[1] a more automated front end with scripts
order of (n) scaling
[2] A way for these to communicate with each other or some torrent like or rss feed or scaled data aggregate data
so feed data up to some sort of aggregate sheet or any number of sheets so that no one sheet is overloaded, eg 1 - 10 feed plus
10 exchanges feed up to one upper spread sheet they do calcs and 10 of those feed up to another upper sheet, this way the caac load is very distributed and easy to grow
Feed down same way 1 to 10 down......6 steps allows for 1 million exchanges each spread sheet only has to do 10 calcs
expand on these ideas
