REST equivalent object of SOAP

Hi,

We are trying to access the Eloqua core object using REST APIs and come to know that there are certain object which are supported using SOAP but not using REST.

For example: Visitors object. Please refer the API comparison at http://topliners.eloqua.com/docs/DOC-3670

I would like to know if there in any equivalent of visitor object in REST which we can access.

Also it seems that some object are available in E9 but are discontinued in E10.

For example - Prospects object.

Any Idea on how we can use this object in E10.

Thanks in advance.

Regards,

BrajMohan