I'm thinking of getting a free SSL certificate for a web forum and having an optional secure version to cater for the paranoid members of the audience, but doing it on the cheap using SNI and maintaining the site on a dynamic IP. Is anyone doing this, do you get many complaints from XP users or from users of older browsers? Any major pitfalls?
(It's not an ecommerce site, and I don't really need SSL. I don't want to get a static IP for no real reason.)