I am interested in getting calender an notes encrypted too.

Other Problems with security:
There is no email-client with pgp/gpg/mime-support! The Claws-Plugin is not ported until now. http://www.claws-mail.org/maemo/

Has anybody compiled otr for n800? Does anyone want to make a package...
http://www.cypherpunks.ca/otr/

What about TOR for anonymous surfing?
http://tor.eff.org/index.html.en

If anyone can give a step-by-step instruction how to compile things from source, I will try.