Seems like it would be easy (relatively, given the data you already collect) to calculate a weighted average between all the exchanges you track, which would be a better one number representation of the exchange rate.
Yeah this would probably be an improvement. Though the spreads between the other exchanges are normally pretty tight and the market price on blockchain is only a guide, it doesn't need the same accuracy as if it was being used for high frequency trading etc.
Something like bitcoinaverage.com
bitcoinaverage looks good, however for our usage direct links to the exchanges are needed.
Indeed - I thought you could still use XMPP for client to server communications
Yep your right, it must due to another reason. I'll take a look.
Awesome! It will be interesting to see if they approve it or not. Good luck!
No response yet. For anyone who is interested in testing an Alpha can be downloaded here
https://blockchain.info/wallet/desktop-client - I've also put up a bit of a comparison between the available Blockchain clients here
https://blockchain.info/wallet/ways-to-access