As a result of the investigation, Minor Threat's PGP key has been compromised so you should delete his key from your PGP key ring. But the good news is the government still cannot crack PGP -- at least not unless it involved a National Security issue (ie: NSA). In two separate hacker cases, the government has asked the hackers involved what their PGP password was, after having their PGP secret key rings for several months. So keep using PGP and always use the maximum key length -- protect your privacy -- use encryption.

Minor Threat will generate a new PGP key upon being released from prison -- this is, if it is still legal.