Truecrypt is not a password manager...it creates encrypted hard disk (and memory card) partitions...all data stored on those devices will be encrypted.
For a password manager, I highly recommend keepass. There are Maemo, Windows, and Linux (desktop) versions. The Maemo version is only really usable with an N810, since Qt for Maemo doesn't support the Hildon on-screen keyboard yet. See http://qt4.garage.maemo.org/dists/ch...rmel/keepassx/ and search the 'net for "keepass" and "keepassx" for the Windows and Linux desktop versions.