Translation using Gettext (or anything else)

We are now using quite fast (I think) translation system, but it has a few limitations, eg. we don't have an online contributed translation possibility.
The question is, if we should port to Gettext [http://www.gnu.org/software/gettext/manual/gettext.html] (this could be relatively easy), write our own online translation system or do nothing (maybe amount of text to translate is too small to bother with this all).

By the way, I found a relatively easy way to translate course descriptions - just use eg. "set course_description bunnyhill_desc" in info.tcl, add _() function around the description in the sources, and voila - translate it like a normal text - but add pp_translate_string "bunnyhill_desc" "REAL description" to en_GB.tcl.