How to get free SSL for a multisite?

I recently read an article on using Cloudfare's free services to get their "Flexible SSL," which I believe would handle a multisite also. Maybe it won't remain free. Does anyone know if this is a good option for a multisite? And would I have to cancel my single SSL on my host that I currently use?

I also seem to remember an article in one of the WPMU Blog News issues talking about free SSL options. I can't find it now. Do you know what issue that appeared in?

It seems that Google is almost requiring SSLs, so I'm looking for an affordable option, other than getting an SSL for every subsite.

Thanks, Joe.