There are a nearly unlimited number of spam blogs out there. How about we put them to work for us for a change! Google does a great job of letting you find them... especially by using the date ranked feature on their blogsearch. When you find one that allows immediate comments (who's going to go back and moderate the comments) you can leave on-topic comments using the anchor text of your choosing. Is Google going to punish you for being "too dumb" to realize that you've been fooled by a spam blog?