Wildcard DNS Service

xip.io - brilliant simple service for developers:

10.0.0.1.xip.io resolves to 10.0.0.1
www.10.0.0.1.xip.io resolves to 10.0.0.1 
mysite.10.0.0.1.xip.io resolves to 10.0.0.1  
foo.bar.10.0.0.1.xip.io resolves to 10.0.0.1