I've learned recently that there are SSL Certificates available where you can just buy 1 and it will cover your top level domain (www.mydomain.com) and ALL of your subdomains (shop.mydomain.com, support.mydomain.com, etc).  This can be much more cost effective if you need SSL Certs on several subdomains (usually 3 or more).

RapidSSL.com sells a wildcard SSL Cert for $199.  You can buy it there and have Ultima install it.

http://www.rapidssl.com/ssl-certificate-products/rapidssl/usd/wildcard-ssl-certificate.htm

Note: It does not cover more than one TLD (e.g. mydomain.com and myotherdomain.com).