I'm not quite as gutsy as igorsk when it comes to publishing actual reverse engineering tools, but this evening I managed to get a telnetd onto my K2.
If you know how to build update packages, it should be straightforward for you to knock something together.
http://blog.fsck.com/2009/03/a-produ...ng-so-far.html
http://blog.fsck.com/2009/03/root.html