Courtesy of Bill Pytlovany's
blog, here's a
link to a listing of program installers that insist on installing "extras" by default, such as toolbars and the like.
The problem has gotten so bad over the past two years that I ALWAYS select Custom install if it's offered to me; not doing so virtually guarantees that I'll be uinstalling something, usually Yahoo toolbar. I'm taking my cue from Bill and bookmarking the list