Ok, finally I managed to telnet into kindle. Thanks, imode, for all your help.
Now that I managed to get in, I will try to explore around a little. But basically, I wanted to do a couple of things:
(1) Connect to the Internet from Kindle DX so that the time and date gets updated; can't stand the date being at 1970...I will try what imode posted above about connecting to the Internet via usbNetwork later; only have enough time to do some cursory look into that /opt/amazon/ebook/config/framework.mario.conf file.
(2) Change the timeout before it goes to sleep mode (i.e. goes into screensaver after 10 minutes of idle). I would like to disable that or set it to a very high value. Where is that setting located?
Thanks so much!