I was browsing my old presentations and found this. I think it came from Dave Shen. I'm making it downloadable because everyone should have access to this history. I added the latest.

1. Homepage
1994-Present

2. 1995: first graphic logo
First Yahoo 1994

3. Oct 1996: Current Yahoo! Logo Feb 1997: First Buttons
+ banner ad + product trough

4. Feb 8, 1999: new buttons + content
Feb 29, 2000: first promotion mantle
created to promote shopping for xmas

5. July 3, 2002: Anti-aliased logo,
March 31, 1999: visual redesign
redesign product trough, mantle,
+ Rich Media Ads appear
Ad position moved to east

6. August 2003 July, 2004

8. 2012