Found this while googling something else might be useful to someone 
http://zavax.wordpress.com/2013/04/24/how-to-3d-print-peel-able-supportive-raft-base-platform-with-slic3r/
Did this guy post a copy of his post processing script? Looks really cool
not sure but would agree on the coolness, should be included in the next official slic3r.
Was a feature request submitted to the slic3r github?
Don’t think so, but open to correction, my last comment was more of a wish than a statement of fact.
This look really good, I too hope it gets included in slic3r.
That’s nice for flat-bottomed prints. How can the method be expanded to support?
That’s freaking terrible. This is no way “peel-able support”, the dude was pressing amazingly hard with an exacto knife in order to get the parts separated.
I took that to be the “before” case in the first video. Unfortunately, there are only stills for “after”.
@Dale_Dunn , doesn’t seem that way; check the description of the video on youtube: “This videos shows how to remove the supportive raft/base from your 3D print. If you follow my instruction on “How to 3D print peel-able supportive raft/base/platform with slic3r” at http://zavax.wordpress.com/2013/04/24… The raft will come off easily with just some small knives. You will be left with a perfectly non-curling flat bottom of your print. Check out my blog at http://zavax.wordpress.com for more interesting details!”
That’s the video of his raft that “comes off easily”…with “just some small knives”; except it’s pretty obvious he’s really pushing on that exacto.