Shylock have recently released version 1.1 of their Shylock Adsense Plugin. If your a wordpress blogger who hates having to edit templates then this plugin could be for you.
They say
Shylock Adsense is a WordPress plugin that allows you to insert Adsense ads on your blog without modifying the template. More then that, you can set it up to show different Adsense ads for articles older then X days (x is the number of days you decide).
For example, you can insert a 468×60 ad at the bottom of a new article, and once that article turns 7 days old it will have a more aggressive 336×280 ad blended with the text from the beginning of that article.
This way your regular readers will not be bothered by your ads, while visitors coming to older posts from search engines or other sources, will see a version that is monetized better.
Another feature is the ability to have articles without ads inserted in them, very useful for payed reviews, where you might not be allowed to have ads (I think it’s the case with PayPerPost).
If you have any problems with the plugin please post a thread in the forums and I’ll do my best to help 
Download : here
Hi Kev, thanks or notifying about the update.
I have trouble with this plugins older version. It does not allow me to insert ads in between the article. It allows me to add the ads either at the top, top-left , top-right and bottom only.
I want another option – middle or center – of the post.
May be they should consider it for the next update.
Cheers!
Mani
Kev, I contacted Alex with the email id you provided. He was quick to respond and actually the new version had almost all the concerns fixed.
It works like charm for me!
Strongly recommended.
Cheers!
Mani
Nice plugin works like a charm!