We aren’t going to expect anything too different from the X41 (well a Tablet PC version of the X60 would be nice…), because the jump to the Core Duo platform is enough of a change as it is (and too many changes would reduce the portability of the ThinkPad).
They rated it very highly, giving it an 8.5/9 out of 10, saying that the only drawbacks were Lack of DVI support, new dock and power connectors, and a high price compared to most laptops while calling it one of the best ultraportable machines on the market.
This is a much more in-depth review of the ThinkPad. Full review.