The answer is a definite "yes" according to the data presented in this article: The Rise of Software-as-a-Service (CIO Today, December 27, 2005). Salesforce.com is offered as a prime example of companies offering SaaS to corporate customers.

One reason why they're thriving now, unlike the recent failure of the application service provider (ASP) model, is the availability of rich web-based user interfaces powered by technologies such as AJAX. Concerns still exist, in particular top  protection of corporate data/information, putting strategic information outside the firewall and integration with on-premises solutions - but as the cost differential benefit grows, users are finding it easier to accept these risks.

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