Greetings:
For those looking to use an external USB keyboard (in Debian or such),
you might want to make the following changes (to the version on the first page):

keysym plus = plus equal equal
keysym apostrophe = apostrophe quotedbl question

So far, the Xmodmap approach seems to be the only successful way to mod the keyboard (at least under EasyDebian). The two changes above fix problems between the mappings that Nokia uses for the rx-44 and what a standard 104 US kbd does.
On those keyboards, the quotation mark is a shifted apostrophe. The rx-44 puts the quote as FN-s. The rx-44 doesn't really use Shft-Apostrophe, so it isn't a problem.

The real ugly is that (for whatever reason), Nokia decided to do +/= backwards from a traditional US keyboard layout. Adding = as a Shift-+
will give you the exact opposite of the traditional layout, but it's either that, or have the rx-44 function the opposite way of it's layout.