I've just got a Sony Ericsson P900 to replace my aging Nokia 7650. It's actually a really nice phone. Does take a while to get used to using a stylus though as I've taken off the flip on mine.

There are advantages and disadvantages to having a touchscreen on the front. It's great for using it and is much more flexible but it's a dirt magnet. You've got to be much more careful about how you treat it unlike a normal phone. Scratch the front of a normal one and it's just annoying, scratch this one and you're screwed.

The phone has about 8MB of free internal memory but comes with a 32MB MemoryStick Duo (Trust Sony to come up with something that looks nearly identical to a MMC/SD card!) but it can take up to 128MB. I've installed Opera on it and it works pretty well.

I only got it yesterday so I can't really comment on how good the battery life is.

In short, it's cool. Get one