I got 4 Aspire one 8.9" for friends/families.
2 of the first batch (3 cell, Linux but has XP installed, 120GB HD) die after 8 months or so around the same time. Send it to contracted service center in Burnaby. They replace both motherboard under warranty.
1 of them has battery problem. it also happened to one of the another same batch I bought where the connectors in the battery slot got banded and can't take a charge until you put it back in place.
The one I am using (6 cell XP Home) didn't give me any problem so far (keep my finger crossed).
If I am to buy another one, it will be either 1000HE or VAIO P. I know VAIO P is un-reasonably expensive, but I can take my eye off the nice design.
I used to have a VAIO UX.