I'm thinking of getting a MacBook Air. The answers to this post will help me make my decision. My questions and my understanding of current solutions are:

1. How difficult is it to install a Linux-based OS (like Fedora or Ubuntu)?
   
   • I've heard a little about rEFIt, but am not sure what to make of it. Is it completely necessary? Do I still need it if I don't plan to dual boot with Mac OS X?
   • Also a dual-boot isn't necessary, I'd just like to run Fedora/Ubuntu by itself, but I'm curious to know if a dual boot is simple.
2. Does everything 'just work'?
   • In my current laptop I need to add a wireless driver (Broadcom card). I've heard Macs use Broadcom wireless cards. Will this be an issue?
   • How about graphics/touchpad (& multitouch)/sound?

I'm aware there are tutorials out there on how to install some older version of some os on your Mac, but my questions are a bit more general: Will it be easy to use (install and configure drivers for) recent Linux distributions with a new MacBook Air?

Note: I don't mind extra configuration, but would like to know where it'll be necessary, because if it's too much of a hassle I'll look at other hardware.