i've been tinkering wiv me new K750i gadget and I have some findings to report:-

The camera is great, not great as in fantastic picture quality, but great as in really useable, even for 4 x 6 prints I should think. I've uploaded an uncompressed example here, taken outdoors which is where it works best. I've also uploaded another example here, taken indoors in low light using the built in light - note - not a flash as such, rather a continuous beam from a couple of LEDS - you can see some graininess in this which highlights the difference between this and a "proper" camera. This was on macro mode, so everything is out of focus except the edge of the cup.

Another nice thing about the camera is that because it has a sliding shutter on the front, it feels more like you are using a small digicam than pointing your phone at someone. oh and it has a cool little panoramic thing.

The video quality isn't as good as I hoped. This is purely because it was described by sony ericsson as "high quality" As much as I dug around, I couldn't find any information on exactly how high quality they meant. I should have known better than to expect anything more than the pixellated compressed results that you actually get - fine for postage stamp sized clips for the web, but not much else. I'll post an example at some point. Still for a phone it's not bad!

The MP3 player is great - you can set off a playlist and then minimise the app, so I have mine minimised and on pause permanently so I can just press the play/pause button on the side of the phone when I want to listen to some music. The provided headphones are also a handsfree set, and they use a proprietary plug/socket so I would need an adapter if I wanted plug any other headphones in or wire into the car stereo or anything. If I had known how good the mp3 player was I would probably have ordered a bigger memory card (only 64mb provided) before my trip to europython 2005 in sweden next week.

Mac OSX seems very unsupported as of yet, it pairs up OK via bluetooth so I can transfer files and I have used a hack for iSync to get my contacts and calendar synced up (not 100% smoothly like the T610 though). I havent got it working as a GPRS modem yet either, or SMS dial from addressbook. connecting via USB seems to work OK, mounts as a drive and charges the phone (nice unexpected bonus). I've heard reports of kernel panic when the usb is unmounted, but haven't experienced it myself yet...