This Linux version of the Aspire One is easy to use and has a solid-state drive, but the Windows XP version has better memory and storage capacity for only $100 more. Furthermore, Acer will also release versions with built-in 3G modules. It's really a case of waiting for the new versions to arrive, unless the portability and ease of use of this unit catch your fancy.

It's well-suited to road warriors thanks to its light weight and built-in 3G module, but it's still not the perfect laptop. If you're going to go for the R500, opt for a solid-state drive instead of a conventional hard drive.

It runs Windows Vista, has a large hard drive and is basically a full-blown computer that's about twice the size of a smartphone. It's perfect for anyone who is after a small tablet PC for under $1800.

The Fujitsu LifeBook P7120 is an attractive and cleverly designed notebook with all the bells and whistles of some much more expensive models.

The Sony Vaio SZ15GP/B is a great entry level unit for people who want to get mobile but don't need a monster laptop.

This VAIO is stylish and redefines the meaning of the term ultra-portable. We wouldn't recommend it if you are just looking for a notebook, but if portability is your number one concern, then you can't go past the VGN-TX27GP.

There's no doubt this unit is ultraportable and it did well in our battery testing, but with a $5499 price tag it's just too expensive.

The VAIO VGN-UX17 is a revolutionary entry into the portable notebook space, offering a fully fledged Windows XP device that is small enough to fit into the palm of your hand. We'd like to see further developments, but it still should appeal to those looking for portability and full PC functionality.

For its size and price this Acer is a great purchase. It has a strong selection of connectivity options crammed into a small package and good battery life as well.

Exceptional battery life and a compact design make the nc2400 a great option for those willing to sacrifice some performance.

A solid ultraportable ultimately let down by poor battery life.

It's rare to find a notebook as versatile as the LifeBook P1610. There are certainly compromises to be made for its tiny frame and convertible design, but if blistering performance isn't essential, the P1610 is well worth a look.