I watched The Brave Little Toaster quite a while back, and even made a live-post about it. What's interesting in that post is in the comments, where jesspark and I had a conversation about how quite a few of the themes of that film were brought over into Toy Story thanks to John Lasseter's involvement in both.
That said, the (highlight for spoilers) garbage disposal scene of Toy Story 3 does look awfully familiar, ain't it?
For the record, I am not belittling Toy Story 3, not at all. I was deeply moved by the film because of its message about growing up and moving on -- so many movies paint growing up as a bad thing (which, in some circumstances, it can be) but growing up and letting go is also very important, and as an adult who's still struggling to find the balance between holding on to innocence and embracing maturity, I appreciate that message very much.