Democracy for NYC and the NY State Teachers' Union are calling on people to support striking Stella D'oro workers by boycotting Stella d'Oro products. I have from time to time bought and enjoyed Stella D'oro products...but I will honor this boycott. From a DFNYC email:

Stella D'oro Workers Ask for Boycott

Since August 11, 140 workers at the Stella D'oro Bakery in the Bronx have been on strike. The company replaced them with non-union labor, so the original union workers have filed an Unfair Labor Practice complaint at the Labor Relations Board and been upheld in a preliminary ruling. The NY State Teachers' Union has joined them on the picket line and contributed to their stike fund. They are gathering support from other unions as well

Action: The workers are asking supporters to boycott Stella D'oro products AND to ask stores in their communities to stop carrying those products.
More info is available on the DFNYC website, at: http://dfnyc.org/content/view/2405/16/

To contact Stella D'oro:
Phone: (718) 601-9200
Address: Stella D'oro Company
184 West 237th Street
Bronx, NY 10463
Website:
http://www.stella-doro.com/contact.asp

The background to the strike seems to be that Stella D'oro has recently been bought by Brynwood Partners (you might want to email them too, not just the bakery) and has demanded a 26% cut in workers' wages.