[kmfrk]

I'll be the token Opera guy in the thread and reiterate that they have a mobile simulator as well: Mobile Emulator.

It's annoying that it doesn't come with default iOS device settings, though, but it's a great alternative to running a server to test on.

[spartango]

This(manymo) doesn't seem primarily meant to be used for web development, but rather Android native application development. Opera's emulator is designed to emulate a mobile browser, nothing more.

[kmfrk]

... and I forgot to c/p the link from my tab like an idiot: http://dev.opera.com/articles/view/opera-mobile-emulator/.