you could try the series sweet little devil, the flower and the star, wife and wife, yuri pop... actually, there's alot under the comedy tag, but you've got to read through to see which you like best... =)
Click on directory, then click on tags on the left side of the page, go to letter 'C' and click on comedy. You should find all the yuri humor you're looking for on the page that comes up here.
