[blockjack]

Actually, 'spam' in the electronic sense is apparently linked to a Monthy Python sketch involving a restraunt where everything contains Spam. From Wikipedia: In the 1980s the term was adopted to describe certain abusive users who frequented BBSs and MUDs, who would repeat "Spam" a huge number of times to scroll other users' text off the screen. In early chat rooms ..., they actually flooded the screen with quotes from the Monty Python Spam sketch.

One could therefore argue that uppercase is the correct presentation.

[derekp7]

I always thought it stood for Self Propelled Advertising Mechanism or something like that.