I bought a US black S10 (4231-3CU). It's an amazing little wonder.
The touchpad is better than on many laptops i used and the keyboard's keys feel really nice, although i still have to get used to the layout, but i'm almost there after 3 days of using the S10.
So far i only added bluetooth, planning to upgrade to 2GB ram soon.
I read the threads about the fan but it has yet to annoy me. I only noticed the fan twice, and it's a pretty quiet fan, so maybe i just don't hear it.
Another happy S10 owner