The first thing you notice about Dell’s SmartPC 250N is that it is silver - or rather, the plastic casing has a silver-effect finish. But the differences between the new SmartPC range and Dell’s dark-grey mainstream Latitude and Inspiron notebooks are more than skin-deep: like most manufacturers, Dell has now succumbed to the temptation to build notebooks around desktop rather than mobile processors -- in this case, a 2.2GHz Pentium 4.