I don't think you have to do this manually anymore.. it looks like the info-on-tap application has been updated today on the author's site. You can just click (from the N800) the 'click to install' and it'll add the repo and install a debian package. You don't have to do the chmod a+x and all that.

I just did the above to check that it worked.
There's a problem though, when I start the application it says
"Can't create logfile" with an 'ok' button and exits. Unfortunately I'm no good with Python and can't figure out what causes this.

EDIT: Ok I did figure it out, by reading the technical readme.txt on the website. It turns out the application expects /var/log to be globally writable, this is not good. A better way is as follows (must be done manually unless the .deb post-installation script is updated to do the same): (NB: The steps must be done _exactly_ as typed, no spelling errors..)
(note that terminating dot ('.') at the end of the last one there)

(If you already manuall did that chmod a+w /var/log as was suggested in that readme I refered to, now is the time to do 'chmod og-w /var/log' to undo the damage.)

Now the application starts. However, it looks like it actually needs some data files to exist in order to do anything at all, it looks a bit non-obvious to me.. maybe the poster that first mentioned this application knows a bit more of what's needed?

I've been looking at these pages:
http://home.cfl.rr.com/genecash/noki...tap/readme.txt
(What it says about the installation is obsolete, it's clearly from before it was made a debian package).
and
http://home.cfl.rr.com/genecash/noki...ocs/index.html