Well, the word "spam" itself – used to refer to unwanted e-mail messages – originated out of references to the Spam Sketch, so any time you hear the word "spam" used in that way, it's a Python reference (although rarely a conscious one).

The following is not a recent sighting, but it's so good I have to share it: Punt & Dennis on their Radio 4 programme "The Now Show" were discussing the takeover of the Abbey National (a major chain of banks) by Spain's Banco Sant Andere, giving rise to the comment (all together now!) "Nobody expects the Spanish Acquisition!"

I laughed out loud. Those guys are brilliant!