It takes it's info off MtGox.com, though I didn't succeed findinout how it does so looking in the "cleaned up" source html or javascript, not firefux debugger helped me. Perhaps installing a sniffer would allow me to see what url is sent to mtgox.com, but I would suspect that the page calls a page that is also if preev.com, be for the public code to work, despite it's obviously made difficult to read.
I wish to have a simple call from php. If you look at
http://blockexplorer.com/q/addressbalance/address, you find that the response is pretty clear and straight forward.
Whether encoded in JSON or in plaintext, that's the sort of "access" I want, though for the exchange rate, from reliable sources such as mtgox, but hopefullt several souces so that I can either average or compute a decision, or at least not rely exclusively on only one source.
Definitely, I'd check mtgox directly, rather than through preev, because the latter would give me the same value yet relayed.
Thanks for your reply
