What are the top 20 whitelisted SEO content publishing channels?

[michaeleagar]

With Hubpages in the penalty box right now, I am looking for other inbound marketing channels to syndicate original content to relevant audiences. I am currently using SlideShare, but I am looking for other channels.

Will you share 10-20 of your recommended content publishing channels that syndicate SEO content?

Context:

What I need are channels that are:

• Low to no budget ($0-50 annual, if they exist)
• Ability to upload SEO content - landing pages, infographics, blog posts, images, videos. Any content type - channels that publish at least 1 of each of the content types I mentioned
• Targeted, relevant traffic (we would assess that one)
• Ability to comment, share or vote (Like) the content
• White-listed by Google, most importantly

Examples:
Slideshare, HubPages (blacklisted by Google for now), and Squidoo (acquired by HubPages)

[LeeC]

Watch the Whiteboard Friday video on Why Guest Posting and Blogging is a Slippery Slope