I attached a copy of my updated patch file. I also packaged another N900 rootfs and kernel, with modules to use. This isn't for dual booting, only for testing android. Use at your own risk as always.

Files:
http://nitdroid.loadsofspace.net/n90...0-03-17.tar.gz
http://nitdroid.loadsofspace.net/zImage-20100317

You need a minimum of two partitions on your microsd card, vfat and ext3 with the vfat being the first partition. I'm going to assume you already have these. You also need to have bootmenu installed with the correct android.ext.item in your /etc/bootmenu.d/ folder.

1. Download the android filesystem and extract it onto your ext3 partition as root
2. Enable R&D mode on your n900
   
   Code:

   flasher-3.5 --enable-rd-mode --set-rd-flags=no-omap-wd,no-ext-wd

3. Flash the kernel
   
   Code:

   flasher-3.5 --flash --flash-only=kernel --kernel zImage-20100317 -R

   You can also boot from the kernel if you want your original kernel to stay intact when you reboot.
   
   Code:

   flasher-3.5 --load --boot --kernel zImage-20100317

4. Boot your N900 with the keyboard open and choose the android partition from bootmenu

That should be enough for a booting android install.

I'm testing out the page flipping patch, so let me know how it goes