I have a dell mini 10v I do alot of my reports and uni work on it, and tbh I have found it to very suitable when doing work - you can actually get annoyed if you try and distract yourself by going on youtube or something cause it lags :P
Anyways, I found the 1GB gets used up quickly by firefox, word and pdf viewers - so i bought this ram from amazon:
2GB, 200-pin SODIMM DDR2 PC2-6400 memory module.
I really hope this works because it costs £25, which is quite pricey. Make sure you get a proper screw driver because most of mine dont fit exactly into the screw - so still not installed it yet.