I'd recommend getting exactly what Sunshine mentioned.
A netbook is great as a secondary computer, but processing power (Intel atom, AMD neo, Nvidia tegra(i think it's tegra)) is pretty low, so usually multi-tasking slows it down. Most people think they only do one thing at a time, but think that if you are running WLM, internet explorer and word while playing music is actually a lot.
When you do go with a ultra-portable computer with a ULV processor, you put more power on your side, while still having a all the advantages of portability and battery life.
If I remember correctly and that you do live in Montreal, take a look at this machine right here :
http://www.futureshop.ca/catalog/proddetail.asp?l...128773&catid=25313
It's extremely similar to the one Sunshine posted, you do get an 11.6 screen size with a pretty full sized keyboard and a screen on which you can actually read stuff. Battery lasts you up to 7 hours (say more like 6 for real usage), you get 3GB of ram and 250GB HDD which is very good. And of course, since it comes pre-loaded with Windows Vista Home Premium, you get a free copy of Windows 7 as well.
The unit is currently on sale at 449$. I sold one of them to my sister's boyfriend's sister. She loves it.