JD Supra and LinkedIn, Like Peanut Butter and ??

I wrote last week about the news that JD Supra is Now Linked Up to LinkedIn. After writing that, I came across a post from Martha Sperry in which she said that JD Supra and LinkedIn go together like peanut butter and jelly. Now I read, via Jayne Navarre’s Virtual Marketing Officer blog, that Ron Coleman, of the blog Likelihood of Confusion, says JD Supra and LinkedIn go together like peanut butter and chocolate.

And so I ask: Which is it? Is the match-up of JD Supra and LinkedIn like peanut butter and jelly or like peanut butter and chocolate?