Have you noticed that as well? Spam used to be up to 70KB in size. Annoying, true, but not atypical of a good sized e-mail.
However, in an apparent attempt to take advantage of the growing availability of broadband, I've noticed spam is more often 250-300KB in size. So much so I've gotten more "Your mailbox is over quota" messages in the last two months than I received in the previous 10 years. I'm hoping that going from 30MB to 5GB mailbox size wise will reduce that pain somewhat.
On a more amusing note -- have you heard about Faux News attempt at televising a revolution, "Teabag Parties", on the 15th of April? As is typical of the cluelessly backward, they've managed to stumble into the phrase "tea bagging" as a verb to describe the fun of a few dozen shell shocked mental midgets who can't grasp that they're not just in the minority, but a REGIONAL one at that:
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"I got my teabags right here..."
Now if I can just find a way to exclude the AP and any publication owned by Robert Murdoch from my google news page...