It's apparently spam season - there's been a wave of spam pounding the blogs this last week. Most of it has been blocked, but the occasional piece has gotten through - and I then get rid of it by hand.
The type of attack is the classic "untrain the Baysian filter" thing - a string of nonsense words, followed by a link. However, there's been some variation. The first wave included links that went to good sites - I guess this is to cause grief for blacklist filters. Now, the spam I'm seeing has two links: One an href, the other plain text. Which one goes to a spam site and which one goes to a "real" site varies.
The bottom line is, the spammers are changing their tactics again.