Yahoo Groups, Unique content for Blog

I recently came across a posting where someone is subscribed on a MAILING LIST on yahoo groups, and then auto-posts the incoming mails to blogger.
This is pure genius. Why?
Because we’re dealing with truly unique content which is posted to the blogs via email as soon as it arrives.
It works that you sign up for some group on Yahoo groups, and then get the mailing lists emails sent to some GMAIL account with a forwarder which posts to the blogger blog.

HOWEVER – THIS NEEDS SOME WORK, and here is where i need some input from you guys how to go about this:
The problem is that the yahoo groups messages arrive with a lot of crap attached to them, like yahoo ads and links to yahoo and some other stuff which needs to be stripped.
(This is the reason i set blogger to only save the incoming mails as DRAFTS, and then hand-edit them)
But i want to automatize this. I am wondering whether i can use yahoo pipes, or dapper, or some PHP script or anything.
Goal:
Yahoo Groups mailing group sends MSG with crap attached to some email (the email COULD also further be redirected to a website, eg. using posterous.com. But it needs to be a “hidden” site which only we can access because we dont want dupe penalty!)
Now i need a parser/filter which strips all that stuff out and then posts it further to the blogger blog (or wordpress) – without the yahoo links and ads.
Another solution would be a PHP script which acts like a mailing adress, where i can mail those yahoo groups mailings to…and then it cleans up the email and forwards it to wherever i want.
Anyone any idea?
Notice the potential of this since we’re dealing with UNIQUE content which is not indexed by Google – i just want to automatize the whole thing!