A couple of weeks ago, we featured the Sony Vaio TZ21 range of ultra-portable notebooks. Little bigger than a sheet of A4 paper, the TZ21 series is perfect for mobile workers and "hot-deskers", because it's packed full of applications, and fits easily inside a briefcase or a handbag. The only downside is price: at almost £1,500, there's a premium for its tiny proportions. The Eee PC Small but perfectly formed: Asus's Eee PC But what about those people who already have a desktop computer, or perhaps a chunky but reliable laptop that works perfectly well at home but causes hernias...