If you mean reading a csv and displaying in a list view, you could write a custom service object which takes the csv file as an input and use the Microsoft libraries to convert it into a list and then pass it back to a list view as a list.

There is a Service Broker in the blackmarket section that might work for you, or at least give you a head-start if you need to write one yourself:

http://www.k2underground.com/groups/excel_service_broker/default.aspx