A good source of links it to write press releases about your site or a section of your site and submit them to press release distribution services. Here are few sites which you may find good enough:

• http://www.clickpress.com/
• http://www.webwire.com/
• http://www.emediawire.com/
• http://www.businesswire.com/
• http://www.prwebdirect.com/
• http://www.theopenpress.com/
• http://www.free-press-release.com/
• http://www.pressbox.co.uk/
• http://www.i-newswire.com/
• http://www.pr9.net/
• http://www.pr-inside.com/
• http://www.newswire.ca/
• http://www.pressreleasenetwork.com/
• http://www.marketwire.com/
• http://www.urlwire.com/
• http://www.prweb.com/ (small contribution)
• http://www.prurgent.com/
• http://www.prleap.com/
• http://www.prnewswire.com/
• http://www.prfree.com/
• http://www.openpress.com/
• http://www.softpressrelease.com/