LJ archiving?

[hmpf]

It just occurred to me, not for the first time, that after having completed my fourth year on LJ now I should probably backup (*imagines that word pronounced in Mancunian accent and fights a giggle*... err, sorry. Somehow that word always gets me.) my LJ somehow on my computer/on CD, just in case.

So, how would I go about doing that? Do I download an ordinary LJ client for that? Can you recommend me one? Are there special tools/programs for archiving? Do they archive comments as well als posts? Etc...