getting latest versions of applications (newbie question)

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http://crunchbanglinux.org – hiI've been looking everywhere without finding an answer, so let me try to get some help...I'm discovering  #! 9.04 today. the versions of the usual applications that I get after upgrade/update are really old, like expected when retrieving them from jaunty repos. I'm trying to switch to the maverick repos, whithout much success. I'm also rather surprised that there's no easy to find how-to on the topic, so I'm guessing that maybe I don't get something very obvious. can anyone shed some light on this? is there's a way to systematically get up-to-date (HowTos)