"The Platinum support representative will even do customizations for you, change business rules, add and delete users, and do whatever administration tasks you need," said Hu.

Pombriant said for the enterprise to be comfortable with hosted applications and be willing to shift to a SaaS [Software as a Service] paradigm, it is imperative that this level of premier support is available for IT.

Sandbox, Salesforce's test bed environment for evaluating pre-production customizations, is the other key to attracting larger customers, said Pombriant.

"It will provide the same kind of professional test environment that IT has behind the firewall. IT has come to take that for granted," Pombriant said.

Unlimited Edition will ship as of March 6, and will be priced at US$195 per user, per month.