Congratulations! I like both the bitcoin and the latin inscription. I'm sure your design will be used in various news articles, it definitely resonates with bitcoin's high-tech currency perception!

You can see difficulty factor increase/decrease
at http://blockexplorer.com/q


A mining rig is a computer dedicated to mining, containing one or more video cards preferably with Radeon GPU ( HD 5850, HD 5870, HD5970, HD 6950, HD 6970, HD 6990)
You cand read more at http://wiki.bitcoin.it under mining

I have a mining rig with 2 5870's and it makes me 1/2 bitcoin every day but it made more when the difficulty was lower.

Slush pool is here: http://mining.bitcoin.cz

Good luck!

Bitcoin's enemies know financial incentive fuels hashrate growth so they try to demobilize miners by preventing price increase proportionate to difficulty increase. They try to instill fear telling horror-stories of stolen wallets, or how some computationally and possibly mentally challenged senators will "move" against bitcoin (everyone here knows how their lame, useless "moves" against torrents and wikileaks ended). Maybe it's time to have all mining pool's URL in numerical form integrated in mining software so if domain names get seized it won't matter. Helping namecoin development would also be a leap forward, giving us decentralized p2p DNS. And implementing this providerless Internet solution http://en.wikipedia.org/wiki/Netsukuku would decisively limit censorship as there would be no service provider to pressure legally to hand over any user data nor any central nodes suitable for intercept.

Watch the rollback live here http://mtgoxlive.com/orders but works only with Chrome because of some components which are enabled by default only in Chrome

"First they ignore you, then they ridicule you, then they fight you, then you win." Ghandi

It seems bitcoin is now at stage 3, "than they fight you" so victory is close!

Thank you for the very practical solution! Just one minor clarification for those who need anonimity:

Don't send those bitcoin addresses to yourself by e-mail because you may be traced that way
Just copy and paste them onto SD card

Also try to remember the first 6 characters of an address, it enables you to search for it in blockexplorer.com and see the received bitcoins for that particular address. Knowing those 6 characters is useful because that way you can use any mobile phone with web browser to see your received bitcoins

P.S. If blockexplorer.com displays more than one address starting with the same 6 characters (never happened to me yet) you should stil be able to identify yours by "first seen" and/or by some known transactions 

I remember the first 6 characters which is the minimum required for search in blockexplorer.com
and so I have access to the full address everywhere I have Internet access. Even if there was another address starting with the same 6 characters I would still be able to identify mine by the transactions listed in blockexplorer.com
So I guess this could be a compromise between remembering the full key or absolutely nothing!

I use the following physical method to backup and protect my wallet:

I store the wallet.dat on two SD cards, just like those used in digital cameras. Most of these cards have a switch (slider) on their side that mechanically makes the SD card "read only" thus providing write protection. So once I backed up my wallet on those two SD cards I slide the switch in LOCK position. From that moment there is no way to accidentally erase or for some malware to alter the wallet.dat on my SD card even if I insert it in an infected computer. Of course it's possible and even safer to store the wallet.dat on the SD card in encrypted form (with truecrypt or steganos safe etc.) so that even if it gets copied by an attacker/malware when inserted in a computer it can't get to its data. I use an internal card reader (an external reader will do but a little less comfortable) which means that I just have to insert the card, the windows explorer window pops up in less than one second, I backup the wallet.dat on the card which also takes less than one second and then I take the card out and slide the side switch in LOCK position, another second. So within a few seconds I have a mechanically write-protected backup which is extremely portable, reliable (especially having two cards) and cheap (any size SD card will do even 32 megs! because the wallet.dat is small) and this storage medium is also extremely common around the world.

If you like my solution and would like to donate a fraction of a bitcoin here is my address 1GkNMvnQo5njxf2hXRy7fosJE8Sh11ZRM9   

You have a very good point the BTC/EUR exchange rate should be displayed more often. Today I was able to buy 10 bitcoins for 26 euros (1BTC=2.6EUR at a european BTC market but probably not many know about it, bitmarket.eu