Well I have written a python twitter client which works on n810 and n900. not nearly as polished as mauku, and I garuntee not even remotely as well written, but it does support separate views for 'mentions', direct messages, public timeline, trends, and a search. as well as supporting twitpic.

However my problem is that I can't for the life of me get it to package. following the instructions at http://wiki.maemo.org/Py2deb
in my fremantle scratchbox env the build script just fails with some dbus error.
GLIB ERROR ** default - Not enough memory to set up DBusConnection for use with GLib

so if anyone can figure out a sensible way for me to make it available, then I'll be happy for the help.