yeah X1 comes with a 4 GB in Sweden.
* Battery:
I charge it everyday before i sleep. Of course, it really depends an how much you use it as well as how u set your screen brightness (whether u set it on highest or adjusted "Phone default") ... etc
* Keyboard:
The best I've ever seen & used ... it is just amazing that you can actually spend a lot of time writing mails, sms ...etc without feeling that you miss or need ur laptop/desktop
* Panels:
yes they are still fast no worries
Best panels for me @ the moment are Spb mobile shell, Media, google, fish

along with three other swedish ones. Those are the ones I've been using till now. Sony Ericsson panels 1&2are good and useful but as i said before it annoyed me because of the location & date it shows when it is loading and yes it adjusts itself after of course.
* Themes:
There are six of them but i liked both xperia black and silver. I use the black one cause it just blinds with the whole phone and if u get the silver then the xperia silver theme would suit it nicely.
* Touch Screen:
Sometimes it's difficult to use your finger all the time cause the resolution is so high hence letters are small yeah you can adjust the font/V.keyboard to be bigger.
* Camera:
As i said before, it's not as good as the cybershots phones in poor lighting condition but in normal condition it's quite amazing which surprised me ... I think it can easily match 5.0 MegaPixel phones out there.
The Video quality is just amazing and perfect. The touch auto-focus is just mindblowing
* Internet:
Internet explorer is still my default (maybe because i'm not that familiar with the opera mobile)
* Build Quality:
ASTONISHING

I've been using SE & Ericsson phones for over 10 years now and Xperia X1 is THE best I've ever seen ... all i can say that there are no other phone on the market right now that can match it. See it for urself when it is in stores on display PERIOD
Those are the things that came across my mind now. I think that the rest is just the usual windows apps.
I'll try to make a video review soon
cheers