Over the past couple of weeks, there has been a decent amount of discussion on the subject of Tumblr [http://tumblr.com/], Posterous [http://posterous.com/] and the rise of the micro-blog. Without recapping all the details, the general feeling of many is this: these services make it so easy to post that the quality of the content produced by the users of these services is very low. And with the rise of blogs like “f*&%yeahwelshcorgis [http://fuckyeahwelshcorgis.tumblr.com/]”, many would agree.…