ASUS all-in-one motherboards

Parts

ItemPartPrice
Intel Atom N330 Intel 945GCAT3GC-I$ 87.08
Intel Atom 330 NVIDIA IONAT3IONT-I$ 149.99
Intel Atom 330 NVIDIA IONAT3IONT-I Deluxe$ 189.95
Intel Atom 330 NVIDIA IONAT3N7A-I$ 149.99
IntelAtom D525 Dual-Core CPU Intel NM10AT5IONT-I$ 179.99
Intel Atom D510 Intel NM10AT5NM10-I$ 91.24
Celeron 220 onboard Intel 945GCITX-220$ 50.99

Reviews & Benchmarks of these parts

Legit Reviews - The ASUS AT3N7A-I Motherboard Gets A New Fan - 2009-09-19
Legit Reviews - NVIDIA Ion mini-ITX System Build Guide - 2009-09-04
AnandTech - Two New Ions: ASUS AT3N7A-I and ASRock Ion 330 - 2009-08-28