As others have noted further down plenty of 11.6" models with CULV processors - no need to go up to 13/13.3 unless someone actually wants the bigger screen. I haven't found a 10" CULV model, and as others have noted, they're not much bigger then

One thing to watch out for with CULV is that some are single core, and not much faster than Atom - I would avoid anything Celeron or Core 2 Solo (wikipedia reports a CULV dual-core 1.2ghz Celeron, but I've never seen anyone selling a machine with it.)

The dual core ones are a very good option. The Acer Timeline 1810 as mentioned above is a great machine, although pretty pricy; the Dell Inspiron 11z is another good option, and rather cheaper ($424 for the cheapest dual-core configuration, last I checked.)

There are also a few dual-core Atom netbooks (also 11.6/12" that I've seen) using the intended-for-nettop [very low cost desktop] 330 or D510 - I'm not sure how these do on battery life, and they're still a bit slower than the CULV processors, but they're out there, and priced comparably to the cheaper CULV models. See the Asus Eee 1201N for an example (based on the older 330) but note that's not a recommendation - for the money, the Inspiron 11z with a dual core chip is probably the better option, and at the > $500, < $700 price point, the Acer Aspire 1810 w/ dual core is a MUCH better option.