I post on our blog via postereous. Meaning, I email my blog post to posterous and posterous posts on my wordpress account. My original link in my post was http://www.apple.com/wwdc, but it does this crazy URL forwarding that viglink added in. It clearly affects users.
Even if you are somehow using Posterous to post to WordPress (I'm not familiar with Posterous' features), they're not the ones doing your redirect.
It actually looks like WordPress is doing the same link affiliation as Posterous. They're using Skimlinks, not VigLink, but the result is the same. (Open a javascript console while on your blog and take a look at the skimlinks function.) FYI, Skimlinks is based in the UK. That probably explains why the original apple.com link bounces through euro.apple.com.
As easy as it is to miss, I bet there are a lot of sites doing this now.
This is unrelated to the discussion at hand.