The factory outlet itself changes all the time. I went out the other day and got cartons of 24 Wiggles Poppers for $5.00 which expire in November 2009. It now stocks Heinz products which means that tuna, salmon and canned meals are also available.
The best part of the factory is the coffee shop. The food is super fresh and made on the premises. Even better, it is cheap. I fed my four children and myself for lunch for $25, including drinks. Three of us had wraps at $4.95 which came with a soft drink. Two of us had chicken nuggets and chips and the servings were HUGE! The children couldn't finish the mountain in front of them. Included in the price were poppers.

Approximate cost: $6.00

Haven't been there for a while, but last time I went, prices weren't that much lower than retail, a lot of food was past its used-by date but not labelled as such and there was not an inspirational choice of softdrinks (no diet drinks anymore - at least on that trip). I don't think I bought anything last time, which is a pity because I used to love going there and stocking up.

If you're shopping there, make sure you check the use by date on every item. Last year there were bottles of jam for sale for $2-something (again, not much below supermarket prices) but they had a use by date of almost a year and a half earlier. It sounds like an exaggeration, but I was absolutely horrified and there were boxes of them. Keep this in mind when you're visiting the Cannery.