CNET also has a Top 10 List of Notebooks for February 2006, although their list focuses on all notebooks.
Among the noteworthy (i.e. ultraportable) entries:
4) Fujitsu LifeBook P7120
5) Compaq Presario B1800
9) Acer TravelMate 3000 Series
10) Samsung Q30 (Similar to the Dell Latitude X1)