a little old news but yeah posterous got funding in Dec.
Investors included:
Zimbra CEO Satish Dharmaraj, Eric Hahn, former CTO of Netscape, Guy Kawasaki, and Mitch Kapor.
Definitely very prominent people in the industry who understand the space.
See links below:
http://www.thealarmclock.com/mt/archives/2008/12/group_blogging.html
http://venturebeat.com/2008/12/22/simple-blogging-startup-posterous-raises-725k/
http://www.xconomy.com/boston/2008/12/22/y-combinator-startup-posterous-raises-round-launches-group-blog-feature/
Posterous Gets $750K from Prominent Angel Investors
posted 2009 Feb by Posterous