automagic update and package maintainment

[Eric Persson <eric@persson.tm>]

Hi,

I have a few servers running debian, and I like to automate the update 
and maintainence of the packages for them. I usually try to run aptitude 
update and aptitude upgrade on a regular basis, but I would like to do 
this automatically, but in a safe way.

I'm not sure I can just put the above in a cronjob and feel safe, is 
there any caveats thats good to know about? And how does everyone else 
manage this, probably common problem.

Best regards,
	Eric