Concur E6400 for me
Running 32 bit Karmic on e6400 and does great. Tried Fedora 11 and liked 9.10 better. Running the Virtual Box product as well and bound to AD using Likewise. Efficient and cost effective. Love it. Also run 9.10 netbook remix on an Acer Aspire One and love that as well. Hated the Moblin Project.