I sat down with the Sony Ericsson X10 and had a little play with it on camera. I like the device a lot.
If you're a standard user, I think you'll enjoy most aspects of the phone. If you are a geek like me, some of the social networking features that work nicely for normal folk don't quite work when you've hundreds of tweets flying past every minute, so I aimed to evaluate the device in that regard. I also pointed out that you should definitely consider keeping a charger at work if you're aiming to use the X10 'in anger' -- like most phones of it's calibre, it needs a lot of juice across the day to keep it's gorgeous screen bright and the data feeds flowing.