This post is not exactly about the GreenSQL, but about application for reverse proxies in general

A couple of years ago I developed a prototype (see http://en.wikipedia.org/wiki/GoMyPlace) , but stopped development because lack of interest. I still think that such product can be very popular. There are some rather profitable applications for the solution like signed time stamps for downloaded files which allow to prove fact of the data delivery to the customer.

I will put here more details about possible applications if you are interested.

Thanks.