I think this would help you.

Blogs;
http://www.blogger.com/start
http://technorati.com/blogs/PR

P.R sites;


http://www.prweb.com
http://www.pressflash.com/cgi/click/?3384
http://www.prleap.com
http://www.prnewswire.com
http://www.prwebdirect.com
http://www.pressreleasenetwork.com
http://www.sbwire.com
http://www.theopenpress.com
http://www.hotmicrocap.com
http://www.billhartzer.com
http://www.free-press-release.com
http://www.dbusiness.com/pressrelease.htm

You can get more list through search in this board if you wish to add more.

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