Check the list of Press release websites-
http://www.exactrelease.com/
http://www.prhwy.com/
http://www.pressbox.co.uk
http://www.forpressrelease.com/
http://www.only2press.com/
http://pr-usa.net
http://pr-gb.com
http://pressreleaser.org
http://www.prcarrier.com
http://www.marketpressrelease.com
http://freebusinesswire.com/
http://pressreleaseping.com/
http://www.seenation.com/
http://www.newsbyco.com
http://pressreleasesfree.com/
http://www.newdesignworld.com/
http://www.pressreleasespider.com/
http://newsreleaser.com/
http://prtake.com/
http://www.pr4links.com/

Now press release is a good way of promoting business affairs & events. Its also help in promoting business websites.

Good site list.press release is good for website traffic and increase online visibility. Here I have to share some press release sites
http://webmasters-spot.blogspot.com/2013/06/press-release-sites-list.htm