In addition to All Voices, I found Now Public. http://www.nowpublic.com/ Could be an interesting purchase for a MSM outlet looking to quickly establish it's own I-Report like CNN.
I am familiar with All Voices - and NowPublic. I've met the teams behind each site. Both are interesting. NowPublic got about 10 million in VentureCapital - AllVoices has a bit more but is newer and therefore less well known.
Both have been acquiring other properties. NowPublic bought Treumors (which is the stupidiest purchase ever) and I know AllVoices is looking at smaller CJ sites to buy as well.