Boy, this is going to age me - and ironic that I was just thinking about this last night. In order, including the ones owned by my parents that I used as a kid:
* Apple IIe (64k business model, with dual 5.25" disk drives and AppleWorks. This is also the computer I taught myself to a: type and b: program BASIC on, and played games like 'Wizardry' and 'Bards Tale'; started out with a big green monitor, and eventually went colour)
* Apple IIc
* Mac Classic (college - eventually, my 14.4 modem was )
* PowerPC 6100/66 (college - I kind of miss )
* 2006/2007 13" Refurbished Macbook (not sure the year - it's at home, and I'm not; it was running Tiger when I got it; it now runs Leopard, and will soon belong to my almost-13-year-old child)
* iPhone 3G
* 2010 15" 2.4GHz Macbook Pro (just bought a week ago)
There's also potentially a new iPhone & MacMini in my future, but those wouldn't be until later this year.