Simple for sale.

37signals.com
The web interface specialists at 37signals have turned their experience on themselves and served up at nice redesign of 37signals.com. The old site lives on as the 37signals manifesto (worth reading for any web professional).

With the new site comes a White Paper on Contingency Design (‘design for when things go wrong’) that builds on the examples of contingency design, good and bad, at the previously linked Design Not Found.

The guys at 37signals also maintain a fine blog, Signal vs. Noise.