If you don't want to offer hosting, consider integrating so you could do, say, 1-click "deploy to heroku." I run a SaaS monitoring service (my profile has deta

If you don't want to offer hosting, consider integrating so you could do, say, 1-click "deploy to heroku." I run a SaaS monitoring service (my profile has details) and we've been asked before to produce an installable product. We've rejected the idea not because we lack sympathy with companies that have no-hosted-saas policies, but because the reliability and stability of the service is among the most valuable features.