[Note: it looks like the sites mentioned in this post have been taken down]
I ran across a reference to the site, The History of Branding on the trythisonforsize blog. If you’re at all interested in brands and branding or corporate takeovers and spinouts, you gotta check this site out. Each one of the logos on the site is clickable. Clicking any one opens up a new page with the story behind the brand.
There are links on most pages to the history information on the corporate site and to other resources related to the company and its history.
Warning: cruising through all the information may be addictive.