If you're doing a 12 inch in the near future, I hope you include the Asus 1215n. I've had mine for three weeks and it's brilliant. ION2 and Optimus are easily worth whatever I paid for them. Playing any HD youtube video yields unicorns and butterflies while my friend's gateway (the one reviewed here) only gets the look of disapproval.
My concern is that drivers for ION2 are a bit -fast- slow and loose now, the stock asus drivers were crap, the Nvidia update at launch was crap, but about two weeks ago there was a major update that requires manual installation. It gets roughly double, yes double, the fps of the old pos. Now I didn't write the thing, but it felt like it addressed the PCI-Ex1 link narrowness. (After all, what else could it be? It's just a 210m at it's core, but whatever's drawn on the Nvidia gpu also has to go back down the PCI-E link to be written to the Intel gpu vram (Optimus))
Anyhow, forget the broadcom thing, my friend (a different one, I promise they're real and actually have these things!) has the dell and it's pretty bad. Even I couldn't get that stupid thing to work reliably except for WMP. At least he got his with his new xps 16.
TL;DR I've actually used the gateway and dell netbooks reviewed here and they're both crappy. The gateway gets good battery life though and feels nicer. I love the asus 1215n with it's ION2 gpu and Optimus, and you should too.