Because of the aforementioned bug you cannot directly connect to a web service.  Once that is resolved, it would be preferable to do that directly rather than create a wrapper class.  But in the meantime that is the workaround we have to use.

In this article we have shown how to connect to SharePoint using a wrapper class that connects a web service.  For this article I connected to my own web service, but you could code your wrapper class to connect directly to the web service.  In that class you would do the appropriate data manipulation, parsing parameters, etc.  Here we keep it in a web service in anticipation of being able to directly connect one day.

Hopefully this has given you an idea of how to use SharePoint lists as a data source for your Crystal reports.  As always… keep on coding.