Your link just says because Nate Silver talks about Obama in his blog the site is a propaganda tool. People don't visit for the blog, they visit for the numbers and research. Personally I think it would be the other way around, if he were also a popular Obama blogger but did FiveThirtyEight anonymously that could be considered sinister (it still wouldn't be unless the model was proven wrong, but there would be a perception of deception).
I've seen him a couple times on HDNET and he's extremely clever. I'll be watching him tonight instead of the hacks they put up on the major networks.
And how is he being dishonest? It's not like he's hiding his support for Obama.
The numbers are right or they aren't. We'll see how close the election really is and how his predictions match up with the pollsters.
See http://seanmalstrom.wordpress.com/ (long post, search for "silver" in the text)