Oh, one more thing.
/dev/hda6 494M 390M 78M 84% /
Half a gig for / is a bit on the small side. If you do a ls / are you sure there aren't a bunch of files like core or core.whatever lying around? You can delete those. Also, take a look at crap you may have gathered in /root. Happens to me all the time. Just for ease of administration, a root partition of about 2 gig is nice. Every now and then I clean it up.
Other people may give different numbers, and they may be right. It's just what I'm used to.