Over the years, I've canned tomatoes, peaches, pickles (cucumber, baby carrots, dilly beans...) and jam. Didn't do anything last year because it was such a crazy summer, but I'm jumping back in full force this year.
So far I've pickled rhubarb (refrigerator pickles), baby carrots and watermelon rind this year, as well as made some strawberry-rhubarb jam (which DH has gone through already

).
I'm planning on doing a LOT of tomatoes this year (we go through canned tomatoes like crazy and since there's been stuff been coming out about the BPA in the lining, I figured I may as well just do it myself), some peaches, applesauce, more jam (DH says A LOT more jam

), pickles (cucumber) and dilly beans. And whatever else I can dig up for myself this year.
Though we live in an urban area, we live about 5 hours away from the agricultural area in our province (which is also where my in-laws now live) so we'll do a weekend trip or two up there this year to pick up some produce for me to can.
I love canning - it makes me feel so domestic-y (not a word, I know). I'm the type of person who likes doing this like this, so I tend to bite off a lot.
But I agree, you MUST have the Ball (US) or Bernardin (Canada) to start out. They really explain everything well. I get most of my supplies from Wal-Mart in the US and Canadian Tire in Canada.