SSL-enabling your website brings up issues of actually getting a SSL
certificate from a well known provider or else you get a pop-up window
which only paranoid people bother reading through the whole certificate
to verify it came from where it came from.
The problem is how do you choose? This site
gives a good starting point. It gives a comprehensive listing of
browsers that are compatible with X-provider provided SSL certificate.
A useful tool for those who are shopping for a SSL certificate granter.