The Eee PC comes in several variants, there's the 2GB version and the 4GB versions available at launch, and recently an 8Gb version has been released also. Both the 2Gb and 4Gb can come either with or without a built in webcam - the Surf model deontes that the unit doesn't have one. There doesn't appear to be a 'Surf' version of the 8Gb yet, although with ASUS having recently announced at the CeBIT show that a whole new version was being launched (with a 9" screen and more storage amongst other changes) it's possible they may not want to put more effort in developing variants of the existing range.I mentioned 3g mobile broadband. Extensive reviews of Internet forums and other reviews indicates that a few 3g USB modems are supported out the box by the Eee. One of these is the Huawei E220 which, handily, is provided by ThreeUK on their mobile broadband package and which, if you sign up for a 12 month contract, costs £10/month for 1Gb transfer and will cost you £50 up front for the modem (it's free on 18 month contracts). 

Mobile browsing is impressively fast on HSDPA (3.5g) and on 3g networks. The Eee performs well although is slightly slower at loading sites such as Facebook. Overall, browsing is a pleasant experience.

If you turn off wireless, dim the screen, turn off sound and don't connect to the net, then I can realistically use the Eee for about 3 hours before getting low battery warnings. With the external 3g modem connected or wireless turned on, this drops to roughly 90 minutes in total, (slightly less if I split this into several sessions throughout the day with multiple power ups and shut downs). There's still enough juice to turn it on, check my mail and surf for 10 mins and shut it down again about 4 or 5 times during the day as well as play the frozen bubble game for a while! So for my usage, the battery life is just about sufficient.

Overall I'm very very happy with my purchase. It does what I need it to, and more. For the money this is awesome value when you consider what it does. However there is one huge downside. When I use it in the office, everyone comes over and wants to have a play, which is a nightmare when I'm trying to poke people on Facebook. But then again I should probably be doing work anyway...