Ubuntu Netbook Edition is based on Gnome, which is not too suitable for low-end platforms like netbooks are. XFCE is much more appropriate for this, Xubuntu needs only 2 GB of disk space to install (Ubuntu NE needs 4 GB) and so on.
Remastering its appearance in accordance to Netbook Edition to minimize screen waste would be great for those with small screens (ASUS Eee PCs, for example)