That sounds really interesting, let me know how it turns out if you do this. I'll have to keep this in mind when the hubby and I buy a house, as I don't think they would want us doing that in the townhome... 
This is an AWESOME book!!! Read it, loved it. We don't have a flush toilet in our house, we have a sawdust toilet and we compost it in 55 gal drums.You don't need a hole. Check out The Humanure Handbook and adapt as needed.