I have no idea where Eric Mill got his pseudnym of konklone from but this is a great article he's written about using StartSSL certificates to secure your website.
The great thing about StartSSL is that their certificates are free. My previous SSL certificates I've used have cost money, albeit only in the region of about £10/year. Free is still free.
As far as I can tell StartSSL will let you have as many free (domain/email validated) certificates. I have two registered so far.
I can highly recomend StartSSL to anyone thinking of getting an SSL certificate.