Hi, I wish to triboot ubuntu along with os x and windows xp via bootcamp.
I read some guides how to do this, but it is rather confusing.

What I am really concerned about is whether there are drivers working for the aluminium macbook.
My main concern is the trackpad.

If anyone has attempted this please explain to me what is working etc. and how this can be done.

should be ok
you should try it first
https://wiki.ubuntu.com/MactelSupportTeam/CommunityHelpPages

Hey, I'm sort of dealing with RSI so forgive me if I'm being brief.

Install guide for Ubuntu 9.04, OS X and Vista

1) Partition the first 4( primary, OS-holding) partitions BEFORE attempting to install an OS
( OS X excluded)

2) Ensure that windows resides on the fourth (the LAST PRIMARY) partition

3) Run GPT Sync from rEFIt

4) Install Windows Vista

5) Install bootcamp drivers

6) Install Linux - Ensure that Grub is installed on the root partition !
XFS(filesystem) won't work, ext3, ext2 AND ext4 does, however (recommend EXT4)

7) Add Mactel PPA (Custom packages)
* Get the key for the repository here: http://keyserver.ubuntu.com:11371/pks/look...DB7F87A2B97B7B8

* Copy the contents (including the beginning and ending of the PGP block) to a text-file, say mactel.key

* Add the key (terminal): sudo apt-key add mactel.key

8) Install Mactel-supplied Macbook pro drivers:
* sudo apt-get install applesmc-dkms bcm5974-dkms mbp-nvidia-bl-dkms nvidia-bl-dkms

9) Fix sound:
* Sound via speakers won't work - but anything via minijack (headset) will by doing this:
Add "options snd_hda_intel model=mbp3" to the file /etc/module/options --- Reboot for this to take effect

10) TrackPad works - I can copy my settings for you if you want

11) Done - from here you can write some scripts to control fans, backlight, brightness and such


Let me put it like this:
I use Linux on the MBP all-day and aside from it running a little hot, everything works flawlessly - AFTER TWEAKING.

( heat is due to bootcamp and the Apple-insistance of using the biggest GFX-card WITHOUT the possibility of changing this - The same as what makes Vista hot).

Anyway, if you have some Linux experience I can elaborate a bit and help you, the end result is a Working OS with everything working great. The trackpad sure works better than it does in Windows (two-finger scroll, nice responsiveness etc)

I didn't know about the Mactel repo - cheers!

But I think your install is a bit convoluted there. Unless you still use Tiger, it's possible to bootcamp Vista (or Seven....) in the usual way, then resize the Leopard partition in Disk Utility to make some room for Ubuntu, then install it to that middle partition. That's how I've done it for the last couple of years with Leopard...