I recently invested in an iPhone 3GS, a friend of mine was selling it cheap so I snatched it up, all I needed to do was fix the mic. Anyway, I've jailbroken that sucker and now it has a much better look and theme to it. Couple of screenshots of it:
That is my biggest problem with Apple, is that they are always changing who provides thier products and not giving enough freedom with to use them as you wish. Although, I'm actually looking to invest in a mac myself, so it's not like they're losing many customers, but it's still kind of annoying.