[ubuntu] What am I looking for? Bootchart.

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http://ubuntuforums.org – My 12.10 laptop with gnomeshell is booting quite slowly. It has never booted particularly fast, and I feel it's probably rather slow for its specs. (quad core 2.2 ghz, 8 gig ram - takes nearly 90 seconds to boot and login). I've enclosed a bootchart, but I need help in understanding what it means! Never seen one of these before... Cheers! Edit - can't upload a bootchart.png of a size that's readable with the forums attachment rules, so here's a link to it in dropbox: http://db.tt/Dg20wdtr (Hardware)