But, what you will face when you install Arch Linux?
Despite of the speed and simplicity you'll find it somehow dificult and not so polished. Let me list some:
1. Default Out of the Box installation is targeted to users with very decent knowledge about Linux. Average user or beginners probably will not able to install it. There is no graphical environment by default too.
4. When installing mysql or apache or something so called daemon in Linux world, the package is not configured by default to start upon system boot. You'll have to do it by hand by editing /etc/rc.conf
5. Unlike Ubuntu there is a lot of updates every day. If you are a developer, it is quite impossible to stick with a particulary (stable) library version for some time, say 5-6 months. Worse, if you are ATI videocard owner, you have to manually hold an old version of Xorg. The later was fixed recently, but there is no waranty of breakage.
So, what to do if you want to try Arch Linux, but want to avoid the above too?
1. Try Chakra Linux (a kind of ArchLinux, now separate branch), Archbang, or Bridge Linux. You can also wait a month or two for my super polished arch based AmeOS.
wiki which can save you a lot of headache. Read it everytime you want to do some administrative task like install new driver or package, just because the packages in Arch are so fast moving target and you have to know all the latest configuration tips and tricks in order to get best optimized and fully (also bug free) working system
3. Try to install as much packages as you have in mind and do not update next 3-4 months. Then update your system at once. Read the wiki and news on main page before update. That is my preffered way.
5. Read my blog to gain more knowledge about Archlinux and make your life with Arch easier.