I understand from the Apple developer site that Xcode 4 requires an Intel Mac running Snow Leopard, but I can't see any advice on hardware spec (other than Intel).
I imagine it could run on an old Mac Mini with 1GB of Ram, but that perhaps I'd be pulling my hair out before too long.
What is the minimum sensible spec to run Xcode? This would be for developing iOS apps, so I'd be running the emulator too. It is only for home use and my own education, so I don't have a big budget, so I'm looking to buy off eBay or similar. As I already have spare keyboards, mice and monitors I'd probably get a Mac Mini.