Here are my observations on all of the great comments above...
* I live in a multi-lingual country. The best argument to ever win a client for Sitefinity would be that it has multi-lingual support baked in. So a Small Biz version really should have this.
* I don't agree with the unlimited number of pages. If it is a small business, they've probably limited marketing resources and will not need hundres of pages. Set a limit to 25 or whatever. If they need more, they're probably not small biz.
* Support: why would a small web developer (like me) need 10 incidents per Sitefinity install per year? Make it one or two incidents, there's always the community forum for most questions. One of the best things about all Telerik products is that almost all community/help information is found on the Telerik websites themselves. Every time I look something up in Google, I end up in the forums or documentation of Telerik. This makes (almost) every single customer value the great support we get from Telerik. So, don't cut on the range of support options, but push the community options harder than the direct support options (or limit them in number).
* From my point of vue, I can agree with a price point of $400/$1000, but I don't think there should be a free version. There are loads of free cms solutions out there. Nobody will ever appreciate the true quality of Sitefinity if it is free. Free equals low quality in many minds. I had two potential clients for the full version, but in the end the deal was off because of license + development costs. The free version was not an option in their minds, an affordable version would have been ideal.