The x8 is smaller but thicker on the other hand the arc is longer but thin
yes it does
The Xperia X10 is much better than the X8 specially after the Android 2.3.3 update is released for the X10,
Yes the Sony Ericsson xperia x10 does have many touch screen keyboards, wether the Android Keyboard, the Japanese Keyboard, the Chinese Keyboard, the Korean Keyboard, the Defaut Sony Ericsson Keyboard and downloadable keyboards such as the Iphone Keyboard.
Yes, it is downloadable from the Android Market.
They are exactly the same except the sony ericsson vivaz pro has a slide out keyboard and the sony ericsson vivaz doesn't. I have the sony ericsson vivaz pro and it's awesome :P
There are many different ones, depending on your phone.
Yes, a 2GB memory card is included.
It depends what kind of phone you are looking for.
You have to download an bluetooth app from the android store the it should work :)
From £69.95 at carphone warehouse to some prices into the hundreds of pounds.
No It does n ot have a front facing camera