I want to do a demo of an iPhone optimised WebApp using my MacBook Air with a local server, so I don't have to depend on getting an internet connection or WiFi access from my client.
The Air is running Lion 10.7.2 and the iPhone is on iOS 5.0.1.
When I create a network on the Mac I can join from the iPhone, but when I open "http://my-macbook-air/" in Safari, it doesn't work.
Strangely it doesn't seem to utilize the WiFi, as the indicator never appears (but shows connected in the Settings app).
Possibly related: Why is my iPhone unable to connect to an ad hoc wifi network? (though my question is Apple <-> Apple, so I expected it to work).