In addition to PRWeb, also check out PitchEngine. It is more like a media release site - goes beyond just a 'press' release. But PRWeb is better.

A PRWeb release that has been written well can actually show your site right up in the Top 5 results on the first page. It costs money, but it can be worth your money.

You can also use article marketing site EzineArticles' free PR submission site PressExposure.com.

Regards,
Clayton
Sohodox press release
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