Netbooks were made to be taken out on the road. They are also made to access the net. Join the two up and the missing part of the equation is mobile broadband.
O2 currently have a PAYG mobile broadband deal where you get a dongle for £20 and only page £2 a day (or £7.50 a week, £15 a month) to surf the net wherever you happen to be.
Because it’s pay as you go, there’s very little risk in checking it out – so go right ahead.