Remigiusz Ryziński discusses his book Foucault w Warszawie, an account of the short period Foucault spent in Poland in the late 1950s – between his time in Uppsala and Warsaw. While the interview is in Polish, machine translation seems to give a good gist.
The book sounds fascinating, as it has used previously unaccessed archive sources. Hopefully some publishers are exploring translation rights. Thanks to James Tyner for the link.