I am interested in doing some iPhone development. According to Apple, the SDK hardware requirements are an Intel based Mac, running OSX 10.5.7+.
1) Is it possible to reliably run the SDK on non Mac hardware? On some sort of hackintosh setup?
2) If I am running on Apple hardware such as a Mini, is it possible to remote desktop into the machine from a Windows machine? Ideally, I don't want to setup a keyboard, mouse and monitor.
To answer (1), it is impossible to reliably run the SDK on non-Mac hardware, if you want to keep it up to date. Apple can always introduce a breaking change, and quite a few people suspect will often try to do so.
A Mac Mini is a fairly inexpensive way to get into iPhone development.
1) This is definitely possible. Generally, the most reliable setups are those purchased specifically to be a Mac, so you can pick out parts that are highly compatible.
2) This is also possible, using a VNC client from the Windows machine.