Hello m0mchil.
I've been using your client a lot lately with a GTS 250 card...
Today I got a new shiny ATI card and I can't use it with your miner, even if they get recognized by software like GPU Caps Viewer! Let me explain...
I got both VGAs on my PC, ofc there's no "Crossfire" or "SLI" since they are from different vendors. The problem arises since the nvidia uses the CUDA OpenCL, the ATI uses (of course) the Stream impementation. This way, my 2 physical cards reside on 2 different cl_platform....
Now, I never touched python in my entire life... but those 2 lines looks... suspicious


I really suspect this is what's giving me problems: I can't see the ATI as listed in the devices I can choose! I could physically swap the cards, or maybe unistall and reinstal all the video drivers so that the first OpenCL platform is the ATI one, but this doesn't really look an elegant solution IMHO
Suggestions for solving my problem are welcome! EG: patches, or how to compile 2 different executables for windows.

Take bias aside, that's rather standard on wikipedia today.
I guess I should have been more precise when I said "first thing coming into my mind". I was actually visioning bitcoin as a possible complementary currency, at least as a starting role: initial diffidence from people could easily be reduced by paying just a % of the total cost in bitcoins, because I guess everyone would feel more safe seing that guy has a paypal account (or whatever else), so you know who you are sending money to.
The bitcoin economy would grow out of the "standard" economy crisis and grow out as a comunity currency, just like the WIR did.

As soon as I understood something about bitcoins, the first thing that came to my mind was the WIR economy. Sure, bitcoin is decentralized and can be used in anonymous ways, and all... but the uses could be really similar and maybe we could also learn from their past experiences.
Never heard of the wir before? Opinions?
The wikipedia page is enough for an overview: http://en.wikipedia.org/wiki/WIR_Bank

Backing up your wallet after every transaction is pure madness. Consider small marketplaces or "banks", that might receive several transactions per minute. If their server goes boom, the wallet and the backup might be both gone.

EDIT: Sorry for not finding this before, it's explained on http://en.bitcoin.it/wiki/Securing_your_wallet

So, if I understand correctly, if you backup your wallet every 100 address creations or transactions, you're just fine, right? This actually sounds reasonable, I must say. Almost more secure than physical wallet actually.

My opinion: adding another blockchain (if it was possible) would lower the total value of BTC IMHO.
There are going to be 21 Million BTC in total, since we have a "fixed" quantity of money, inflation is kept under control. As other said, it's just like gold, there's a scarce quantity out there.
Then someone comes in and opens another blockchain/cryptocurrency. Since for the end user paying with BTC or "new bitcoin" (hereafter NBC) will be absolutely indifferent, this will mean that suddently a huge mine of gold is found somewhere. Newcomers and old miners will start harvesting the NBC and when enough NBC will be around, BTC value will drop. If the end user is given the opportunity to use both NBC or BTC, it will take time for both of them to lever, but the ones already owning some BTC will probably suffer a lot from this situation.

Speaking of scarce resource, I guess that at worst, 0.0000001 bitcoins (7nth decimal point) are gonna be worth one candy. Since I can buy candies at 5€cents, I expect 1BTC not to rise at more than 500'000$ in value
This reminds me of a story on a comix, with the main characted being sent to a parallel dimension in which 1£ was worth so much they had to pay a coffee with μ£s (micropounds).

Let's speak also a bit about psychology: normal people tend to think at a small number as a small value. For this reason I don't actually expect people to accept buying bitcoins if their price gets too high. I guess a show stopper will be when 1 BTC will be worth more or less a dinner at the restaurant. This realistically means we are never going to see people get bitcoins for more than 20/30$ each: the only way out is to give 0.001 BTC a brand new name, maybe "SBC", small bit coins.