Hello,
I'm also a (now quite happy) owner of the MGB 111, as I just flashed the new image from chimbo. Runs quite smoothly ^^.
The bittorrent-problems some might encounter (code on the web-interface) was something I could solve by renaming the torrent file to something shorter (the name simply was too long, as the device saves everything in subfolders of a name similar to the torrent!).
The problem with the users 'anonymous', 'nobody', 'ftp' and 'root' being able to access the ftp-server (well, root with password was led to a folder in the flash, 'anonymous' and 'ftp' could anonymously see the public-folders + USB and 'nobody' finally could see the flash / ramdisk INCLUDING .passwd containing all your passwords) can also be solved quite quickly. As I did not have much time, I just tried out the autoexec-feature (thanks, chimbo!).
Here is my autoexec (placed on 'C' or the 'Public' folder, named autoexec, if you want to be safe, they shoud not be writable for anybody but root [you can do this with chmod, chown and chgrp via telnet, if you want to know more, you may ask]):
#!/bin/sh
#
killall vsftpd
vsftpd /mnt/C/vsftpd.conf &
Then, you need the files vsftpd.conf and vsftpd.user_list in the same folder, same permissions. vsftpd.conf is the same you may find in the Flash, just changed 'anonymous_enable=NO' in the first line and added three lines:
userlist_file=/mnt/C/vsftpd.user_list
userlist_enable=YES
userlist_deny=YES
This loads the userlist I will show you in a few seconds and DENIES ftp-access to all users in this list.
Here is my vsftpd.user_list:
root
ftp
nobody
anonymous
Note that anonymous might be superfluous here, but why not add this one?
Maybe chimbo can add these to a new .BIN, would make things much simpler for many people...
So, finally my question

...
Has anybody already managed to boot another system or to compile for / on the machine other programs? As chimbo added vi and some other handy tools, this must be possible somehow. As I am not that deep into programming C and compiling with Linux (well, I compiled some things already, even a kernel once, but it's something different without a manual at hand), I wonder how this might be done. Another board focussing on another MGB-device (the 2.5'' one) already managed to use chroot to boot Ubuntu or some less-extensive distributions (ones that are focussed on embedded devices). I am especially interested in a small (not fast, just as a kind of backup) server featuring simple CRON-jobs, maybe even Apache, PHP oder MySQL. A LaTeX-compiler might also be an option, or SSH-access (sshfs is much easier to use when in Linux...).
I'm not sure how much this thing can take with its 40 MHz, but with enough swap space and time, some things should 'theoretically' work.
Hope to hear from you soon,
OliFre
EDIT: Those who had problems with the download of chimbo's .BIN... I had too small files, too, with a DownloadManager, everything was perfect immediately.