From a Search Engine Land Article by Pamela Parker:
Buzz was a great learning experience, says Google, but in a few weeks it will be shut down and all such efforts will be focused on Google Plus. The move will likely come as no surprise to Google-watchers, who noted that Buzz integration with Google+ was minimal. Additionally, the Google Labs page, as previously announced, will disappear after today.
Read Pam Parker’s Complete Article
This Google Blog post has more info about the end of specific programs and services.
Here’s what it is says about one program:
The University Research Program for Google Search, which provides API access to our search results for a small number of approved academic researchers, will close on January 15, 2012.