I couldn't find much info on the n900 bootmenu. Not a thread in http://talk.maemo.org nor on http://wiki.maemo.org but just info randomly scattered about. Would anyone else be interested in helping create a wiki page?

I ask because there are a few boot situations I want:

1.) Default Maemo from NAND
2.) A console to boot into if I screw things up
3.) A bootable easy-debian on /dev/mmcblk1p2
4.) An alternate maemo5 on /dev/mmcblk1p3 (for safe testing)
5.) Android 2.2 on /dev/mmcblk1p4 (NITDroid?)
6.) Mer? Moebilin? Meego? Whatever else comes to mind.

Installing the bootmenu package gives me a menu when I boot with the keyboard open. How do I configure this menu? How do I open a terminal from here? What needs to be done to enable usb-networking? What needs to be done for ssh to work?

I'd also be interested in how the bootmenu works. Is there source code available? What possibility is there of u-boot working? Or better yet, grub? I know these questions have been asked before in various other threads, but I thought it would be easier to read if they were all consolidated in a wiki page.

Any pointers would be appreciated thanks.