Not IPS, but then it is nearly 2 years old. 311 ppi.
There's been a bunch that have been in the 200-300 range but apparently they don't count as 300 is the magic number (assuming you are holding your phone a specific, yet unspecified, distance from your face).
1. http://www.apple.com/iphone/specs.html 2. http://en.wikipedia.org/wiki/Nexus_One
A 100,000:1 contrast ratio doesn't do you any good when you can't even see anything in sunlight. OLED may give a great contrast ratio, but any direct light (ex: being outside during the day, a common usage senario) means that you can't see anything anyways.
A feature which won't be included in Windows Phone Series 7, and a feature which frankly sucks on my Android phone.