They're yet to start it to notebooks. But the MiE interface is sort of an experiment actually. I've heard that if they get good feedback about it, they'll start including Ubuntu or MiE on notebooks too.
Bleh, everyone is doing linux on netbooks, it doesn't take any courage at all. What Dell is doing is actually challenging the status quo by putting it on desktops and laptops. THAT is what needs to happen. And HP, meanwhile, continues to be a lackey to Microsoft.
I think HP sold laptops with Suse at one point. But it was like they were trying to keep tabs on it, the pages were not easy to find, they were only for sale in the US, they didn't advertise it much, and now I can't find any linux laptops on their site. Meanwhile Dell is actually publicizing what they do,