First things first - Does any of your daughter's course work run on Linux? (I may be wrong on this point but no doubt some-one will correct me) If it doesn't, then the Acer from Amazon is not going to be much use. The screen is quite small as well.
MSR is quite right about the desktop: A separate keyboard can be had for very little money but a desktop does not have much street cred these days.
There are companies that do recon laptops and they also give warranties with them as well. These would be the people to look for.
Well, at 11 years old she's probably in year 7 and shouldn't have to worry about coursework until year 10 (even then a lot subjects are getting rid of coursework now).
I really don't see the need for a laptop yet, but a desktop with most of the office programs (publisher, word, excel, powerpoint and later on programs such as access) should well cover what she should encounter. She shouldn't need to use it for huge amounts of time each week.
That is, unless school ICT use has quadrupled in the year I've been out of mainstream education, in which case a separate laptop may be in order.
WR speaks truth, sad to say... no doubt a fair bit has to with street cred - even at age 11.
The long-haired RSM is raising issues ref wifi and EMF hazard - I'd probably look for Sky broadband as it allows multi user surfing; I can large it here while they Bebo / MSN / maybe do some homework; any thoughts on the EMF issue?
Most of the girls from year seven upwards have been having the little ASUS Eee PC 4GB Pink Netbook .A friend of mine bought this model and her step daughter was really impressed .
Its excellant for school projects, Research and speaking to her friends on MSN . Just buy a additional Cd Rom Drive from ebay for about Â£30.00 and a A USB flash drive.