Salesforce.com as a Universe datasource

I'm looking for solutions to use Salesforce.com as datasource for my Universe with Information Design Tool (SAP BO EDGE BI 4.0).

As far as I know, the only solution available is tu use datadirect driver, but I only found the ProgressDataDirect driver. Do you know any free driver or another solution to connect the Universe to Salesforce and create WEBI reports without troubles with prompts and queries?