Relevant links

Bitcoin links

Bitcoin.org
The Bitcoin homepage, including download link to the classic Bitcoin wallet application

MultiBit.org
The fast MultiBit wallet application, my personal favorite

InstaWallet.org
The instant online Bitcoin wallet, no download needed, but not very secure
 
Bitcoin Wiki
International Wiki board with FAQ

Bitcointalk.org
International Bitcoin forum

HappyCoins
Buy and sell Bitcoins in the Single European Payments Area

Economics and limits to growth

Paul Gilding - The Earth Is Full
TED talk of Paul Gilding, an independent writer, activist and adviser on a sustainable economy

TheOilDrum.com
Discussions about Energy and our Future

Zerohedge.com
The financial weblog with a critical view on the 'rigged' markets