I admit that I am not brave enough to run Linux natively on my macbook Pro, I run it as a guest OS. However, just like any other OS, it is possible to run Ubuntu natively on your Macbook.
[image from freakyman]
I just found a great tutorial on how to be able to use Ubuntu on your Macbook. Along with the tutorial, there are tips, such as enabling suspend and wifi, available.
You might ask – what is the advantage of running it natively as compared to my current setup, running it as a guest OS? Well, whilst most of the functionality are available when Ubuntu runs as a guest OS, it can't, however, run the awesome 3D eye-candy. hehehe. So, if you want to be able to blow away Vista, run Ubuntu natively on a Macbook – that is a one-two punch to Microsoft. ha-ha-ha
As for me, I am sticking with Ubuntu as a guest OS. :)