If I was to make a guess as the 'netbook OEM' Hyperion will be using, I would guess it would be LinkBook. They are the only netbook OEM I know of that use a PowerPC processor as their base.
http://www.linkbook.co.za/http://liliputing.com/2010/05/linkbook-9-inch-netbook-with-a-powerpc-processor.htmlConsidering their web site is promoting the fact that their 9" is 'almost sold out', I would not be surprised if a 12" model is waiting in the wings for the 9"s to be sold off.
That coincides nicely with Hyperion's "next few months" release of the netbook, and why they didn't have a demo model at the show.