Sadly unmentioned is Lem's quite distopion post-apocoliptic work, "Memoirs Found in a Bathtub", a future defined by mega-McCarthyism and the pursuit of any fragment of 'truth' however slimly defined that may be.
I see it rather as either a comment on the search of truth (and its absurdity, nonsense, sense of being lost, despair) OR a "bureaucratic singularity" - creating a sustained, self-living bureaucratic organism, which does not need any external input.
Dystopian works published in Eastern Bloc during the Cold War were typically disguised as critique of the West, or otherwise not getting published would be the least of author's worries.
Still it was rather obvious for the readers what experience they favorite writers are drawing on in their visions of totalitarianism and allienation (and they didn't really need much of the "mega" prefix).
For this reason I'd take terms such as "mega-McCarthyism" with a grain of salt in this context.
Evil and bloodthirsty as he was, it's not really senator McCarthy you'd be uncomfortable about in People's Poland AD 1961.
And in any case, it relates to the fragility of information stored on the Internet. (The funny thing is that the disintegration of books was not too realistic; but the possibility that we store all information on computers, and then we lose it, is very real.)
In any case, for me the "Memoirs Found in a Bathtub" (or at least its original "Pamiętnik znaleziony w wannie" - I am the lucky one, who can read Lem in Polish) is the best book by Lem (but not the most typical, and certainly not the easiest).
Worth a read.