concerning micro usb port safety and prevention...
do you mean this one?...
http://talk.maemo.org/showthread.php...+microUSB+port

actually you'll get pretty much every micro usb troubleshooting topic if you use the button near the top of this page called "search"
Wasn't hard to find all the threads...
I just copied and pasted "soldering the microUSB port" statement from your post and tossed it into the search.

For an exceedingly long time the nokia proprietary firmware and flashers have been gone..."PROPRIETARY" being the key issue...
and that meaning maemo not being able to directly provide them since Papa (Nokia) was a rolling stone...(got that tune in my head)
.I and many others realize that quite a few links should be removed or at least an addendum attached to the text to at least explain why the link is broken.
Hell there are alot of broken things around...
It's a man-power issue.
There are tons of posts concerning where to find them...just type it in.