Rudolph

First, my favourite - the FBI's file on Carnap!

FBI Records (Rudolph Carnap)

Amazon?

Rudolph Carnap: Books 

Facebook?

Rudolph Carnap

(I know: that isn't Carnap.)

Er, in an essay on Carnap and inductive logic (this one has gotta be a spellcheck typo ....)

"Like his distinguished predecessors Bernoulli and Bayes, Rudolph Carnap continued to grapple with the elusive riddle of induction for the rest of his life." (in "Carnap and the Logic of Inductive Inference", Handbook of the History of Logic.)

In the occasional book,

Philosophy for Linguists: An Introduction 

Mindful Universe: Quantum Mechanics and the Participating Observer

In an article,

".... but surely not in the case of Hilary Putnam or Rudolph Carnap" ("Modal Epistemology and the Rationalist Renaissance")

In a 1978 book review in Mind:

Rudolph Carnap, Logical Empiricist

Some blogs:

A Profile of Rudolph Carnap (3quarksdaily)

On Rudolph Carnap's The Logical Structure of the World (Partially Examined Life)

Online excerpts (this is very good, btw: Carnap on observables and Ramsey sentences):

Rudolph Carnap: Philosophical Foundations of Physics, Chapters 23-6