Linpus Linux Lite is not for everyone, but it does provide a very fast booting responsive operating system that works well on my Netbook. It boots to the desktop in 15 seconds, and is on wifi in like 20 seconds. It is based on Fedora 8, so you can add additional software to it if desired. For quick web connectivity, it's hard to beat.

http://www.linpus.com/products_1.php?gid=1