MSI U123 is the successor of now aging U100. The U123 comes with 2GB RAM and uses the N280 Intel Atom processor. The MSI has also launched MSI U123H, which is similar to the U123 except for the fact that it comes with built-in 3.5G. The U123T comes with a built-in TV tuner card, which will let you watch (and record) TV programs on your netbook.
However, it is not a huge upgrade. I was looking forward to higher resolution. 1024 x 600 is nice but 1280 x 800 is something I would have really appreciated.
One piece of information that the MSI is repeatedely mentioning in the news release is the massive capacity of U123, which is 160GB. What? We have been using the 160GB HDD in our netbooks from quite sometime. In fact, it is a standard feature in netbooks these days and there is no need to mention it 4 times in the news release.